Specimen Cracking Or Crack Propagation Patents (Class 73/799)
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Patent number: 8436898Abstract: This invention comprises a system and a method for inspecting the inside of delayed petroleum coking vessels to determine deformations, detect and determine the severity of other defects and visually observe the inside of the inspected vessel.Type: GrantFiled: May 10, 2011Date of Patent: May 7, 2013Assignee: Custom Industrial Automation, Inc.Inventors: Richard D. Clark, Daryl K. Rutt, J. David Stratton
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Publication number: 20130086991Abstract: A detection process is disclosed. The detection process includes applying a load to a preselected portion of an article. The applying of the load permits visually indiscernible cracks in the preselected portion of the article to be detected. The treated article includes a preselected portion having treated visually indiscernible cracks. The treated visually indiscernible cracks are substantially devoid of damage due to the treatment of the visually indiscernible cracks.Type: ApplicationFiled: October 7, 2011Publication date: April 11, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Francis Alexander REED, Robin Carl SCHWANT, Curtis Wayne ROSE, William Raymond BROWN
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Patent number: 8375803Abstract: The present disclosure provides a device for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. It also provides a testing method that is easy to employ in a consistent and controlled manner and also makes efficient use of the potentially corrosive materials.Type: GrantFiled: October 27, 2010Date of Patent: February 19, 2013Assignee: Chevron U.S.A. Inc.Inventor: Albert Eugene Butterfield
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Publication number: 20130008258Abstract: A method, apparatus and system for testing the self-sealing properties of a concrete sample. The method may include providing an apparatus for creating a consistent and reproducible crack in a concrete sample and creating a consistent and reproducible crack in the concrete sample with the apparatus. The method may further include providing a fluidic delivery system that provides a consistent flow of fluid for testing the self-sealing properties of the concrete sample and testing the self-sealing properties of the concrete sample with the system.Type: ApplicationFiled: May 11, 2012Publication date: January 10, 2013Applicant: KHI CAPITAL INC.Inventors: Kevin Yuers, Rishi Gupta, Alireza Biparva
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Publication number: 20120296575Abstract: A system is provided for improving the damage tolerance of a rotor assembly. The system includes one or more measurement subsystems for measuring the stresses in respective parts of the rotor assembly and issuing respective measurement signals. The system also includes a control subsystem for receiving the measurement signals from the measurement subsystems, determining a response to measured stresses indicative of crack growth, and issuing response signals. The system also includes one or more release subsystems for receiving respective response signals, and activating controlled release of material from respective parts of the rotor assembly to mitigate the effect of the crack growth.Type: ApplicationFiled: May 2, 2012Publication date: November 22, 2012Applicant: ROLLS-ROYCE PLCInventor: Alison J. McMillan
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Patent number: 8302485Abstract: The present disclosure provides a testing method for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. The method comprises: providing a test device having: a base configured to house a reservoir for containing the corrosive media and a holder configured to secure the test specimen, the holder includes at least a sleeve to secure the test specimen in place and apply compressive stress against the test specimen, the holder is rotatably connected to the base to lower the test specimen into the reservoir; mounting the test specimen onto the holder; pivoting the holder towards the reservoir to lower at least a portion of the test specimen in the reservoir; adjusting the sleeve to apply a sufficient amount of stress on the test specimen; and filling the reservoir with a sufficient amount of the corrosive media for stress corrosion testing.Type: GrantFiled: October 28, 2010Date of Patent: November 6, 2012Assignee: Chevron U.S.A. Inc.Inventor: Albert Eugene Butterfield
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Patent number: 8291589Abstract: A method for use in repairing gas turbine engine components includes applying a stress to a first gas turbine engine component to cause surface cracking on the first gas turbine engine component and establishing a location of an elevated stress region of a second gas turbine engine component based upon the location of the surface cracking on the first gas turbine engine component.Type: GrantFiled: August 8, 2007Date of Patent: October 23, 2012Assignee: United Technologies CorporationInventors: Ephraim C. Davis, Christopher J. Bischof
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Publication number: 20120210801Abstract: An apparatus for fatigue and/or crack growth testing, including a cyclic loading device and a preferred sample mounted at one end. An embodiment of the device has at least two concentric and coaxial load frames, with guiding interfaces between adjacent load frames to maintain alignment. Solid state actuation systems, which deform in response to the application of energy, are mounted at the end opposite the sample between adjacent load frames to provide up to two modes of actuation, including tension, compression, or torsion. The preferred sample includes a cylindrical gage section with a concentric hole running from a first end, and terminating within the gage section, with one mode of loading introduced at the terminus of the hole, and reacted at the end where the hole originates. A second mode of loading is optionally introduced at a second end of the specimen. Mount hardware for conventional specimens is also presented.Type: ApplicationFiled: February 21, 2011Publication date: August 23, 2012Applicant: FRACTURELAB, LLCInventor: Richard G. Pettit
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Patent number: 8244486Abstract: Storage of information, such as baseline information and structure ID, in a memory that is mounted on the structure, rather than inside the diagnosis hardware. This allows for faster and more convenient information retrieval. In particular, this approach allows for a more modular system in which different diagnosis hardware or other analyzers can be simply plugged into a structure's sensor network, whereupon they can quickly download any desired structure-specific information (e.g., baseline information, structure ID, and other useful information) from the on-structure memory.Type: GrantFiled: April 29, 2009Date of Patent: August 14, 2012Assignee: Acellent Technologies, Inc.Inventors: Chang Zhang, Xinlin Qing, Irene Li
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Patent number: 8234930Abstract: A method of determining fatigue of a pressure-resistant component for high-pressure hydrogen made of a ferritic steel and provided in a high-pressure hydrogen gas environment is provided wherein when the material of the ferritic steel in the air has an ultimate tensile strength Su in the range of 958-1,144 MPa and the hydrogen gas environment has a pressure in a range to 45 MPa, then a fatigue strength in a gaseous hydrogen SH (MPa) for the pressure-resistant component provided in the high-pressure hydrogen gas environment is obtained by using equation (1): SH (MPa)=2,577?1.8925×Su (MPa). The influence of a high-pressure hydrogen gas environment on the pressure-resistant component for high-pressure hydrogen is determined based on the fatigue strength obtained by using the equation (1).Type: GrantFiled: July 18, 2008Date of Patent: August 7, 2012Assignee: The Japan Steel Works, Ltd.Inventors: Yoru Wada, Ryoji Ishigaki, Yasuhiko Tanaka
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Patent number: 8229681Abstract: At least one method, structure and apparatus used to measure tearing resistance of a commercial member. The method includes the use of full-scale testing methods and apparatuses to obtain unloading compliance measurements, which are used to generate a tearing resistance curve that includes the effects of geometry and considers data beyond the yield point of the commercial member. The commercial member may be a pipeline for carrying hydrocarbons.Type: GrantFiled: February 8, 2008Date of Patent: July 24, 2012Assignee: ExxonMobil Upstream Research CompanyInventors: Karel Minnaar, Paulo C. Gioielli, Mario L. Macia
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Patent number: 8214162Abstract: Method for evaluating an asymmetric residual stress for a material by the indentation test comprises applying the residual stresses with an uniaxial and an symmetrical biaxial tensions on the material and then performing an instrumented indentation test indenting an asymmetric indenter on the material; and comparing a slope of indentation load-depth curve when the long diagonal direction of the asymmetric indenter is perpendicular to the direction of the largest residual stress with that in stress-free state, and then a slope of indentation load-depth curve when the long diagonal direction of the asymmetric indenter is parallel to the direction of the largest residual stress with that in stress-free state, so as to evaluate the asymmetric residual stress for the material.Type: GrantFiled: February 6, 2007Date of Patent: July 3, 2012Assignee: Frontics, Inc.Inventor: Jae Hwan Han
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Patent number: 8209151Abstract: In order to make error recognition, for example, in cabling, in the stored data or in the data allocation, in the allocation of a sensor unit to sensor-relevant data for calibration of an analysis unit that is connected with a sensor unit possible, a sensor identification (6) is located in or on the sensor unit that can be polled by the analysis unit (4) and to which sensor-specific data are allocated in a storage unit (5), and a data carrier (7) is located in or on the sensor unit in which a second set of sensor-specific data are stored that can be read by the analysis unit (4) and can be compared with the first set of sensor-specific data of storage unit (5). Upon agreement of the first and second set of sensor-specific data, the measuring signals are transformed into measurement data by considering the sensor-specific data.Type: GrantFiled: July 7, 2009Date of Patent: June 26, 2012Assignee: AVL List GmbHInventors: Jerome Gruaz, Klaus-Christoph Harms, Martin Rzehorska, Rüdiger Teichmann
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Patent number: 8190378Abstract: An element damage determination unit calculates a cumulative value of a damage value using a Manson-Coffin law for a plurality of finite elements of a continuum based on a result of a stress/distortion analyzing process, and determines whether or not the cumulative value of the damage value is equal to or exceeds a threshold. A calculation unit obtains first correspondence information indicating the correspondence between the number of cycles of a load and a growth rate of a crack occurring in the continuum based on the determination result. A Manson-Coffin law change unit changes a Manson-Coffin law based on the first correspondence information and second correspondence information indicating the correspondence between an actual measurement value of the number of cycles of a load applied to the continuum and an actual measurement value of the growth rate of a crack occurring in the continuum at that time.Type: GrantFiled: October 30, 2008Date of Patent: May 29, 2012Assignee: Fujitsu LimitedInventors: Hidehisa Sakai, Katsufumi Morimune, Masanori Motegi, Tsutomu Iikawa
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Publication number: 20120103105Abstract: The present disclosure provides a device for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. It also provides a testing method that is easy to employ in a consistent and controlled manner and also makes efficient use of the potentially corrosive materials.Type: ApplicationFiled: October 28, 2010Publication date: May 3, 2012Applicant: Chevron U.S.A. Inc.Inventor: Albert Eugene Butterfield
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Publication number: 20120103104Abstract: The present disclosure provides a device for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. It also provides a testing method that is easy to employ in a consistent and controlled manner and also makes efficient use of the potentially corrosive materials.Type: ApplicationFiled: October 27, 2010Publication date: May 3, 2012Applicant: Chevron U.S.A. Inc.Inventor: Albert Eugene Butterfield
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Patent number: 8109150Abstract: The precision of crack-propagation prediction is improved by taking into consideration a variation in the error due to inspectors and inspection methods. There is provided a crack-propagation prediction method including a correlation-information preparing step of measuring the length of a crack initiated in a test object by a plurality of inspectors and/or a plurality of inspection methods and obtaining correlation information between data acquired through the measurement and the condition of an actual crack; a crack-length estimating step of estimating the actual length of the crack initiated in an inspection target on the basis of the crack length measured by an inspector during inspection of the inspection target and the correlation information; and a crack-propagation-curve estimating step of estimating a crack-propagation curve of the inspection target originating from the crack length estimated in the crack-length estimating step.Type: GrantFiled: July 24, 2008Date of Patent: February 7, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yoichi Sato, Koichi Morimura, Shinichiro Hori, Shintaro Kumano, Takanori Karato, Masato Kurita
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Patent number: 8042405Abstract: A method of predicting sheet formability at a microscale level includes the steps of providing a grid pattern on a test sheet, bulging the test sheet to a hemispherical shape until a crack is initiated on the surface of the test sheet, detecting the initiation of the crack, acquiring two images of the surface adjacent to the crack and calculating surface strains on the test sheet.Type: GrantFiled: July 23, 2008Date of Patent: October 25, 2011Assignee: University of Kentucky Research FoundationInventors: Nasr A. Shuaib, Marwan K. Khraisheh
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Patent number: 8040243Abstract: Structural health monitoring apparatuses and methods are disclosed. One or more structural health sensors may be used to disconnect and/or connect one or more RFID chips to an antenna such that wireless communication with the one or more RFID chips (or the absence of wireless communication) through the antenna indicates the structural health status. Example structural health sensors may be moisture detecting or fracture detecting. A remote reader may be used to establish the wireless communication with the one or more RFID chips to determine the structural health. The sensors and RFID chips may be passive and powered through the wireless communication from the remote reader. Such apparatuses and methods may be applied to any large structures requiring regular inspection, such as aircraft, ships, automobiles or buildings.Type: GrantFiled: November 18, 2008Date of Patent: October 18, 2011Assignee: The Boeing CompanyInventors: Jason P. Bommer, Gerardo Pena, Matthew C. Malkin
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Patent number: 8015877Abstract: A method for generating an image of an anomaly may include generating a pulse wave into a structure being evaluated from each of a plurality of sensors and collecting any scattered wave data caused by the pulse wave impacting an anomaly. The scattered wave data may be collected by the same sensor that generated the pulse wave or by a different sensor. The method may also include identifying any backscattered wave data from a distal edge or border of any anomaly relative to a location of the sensor collecting the scattered wave data. The method may additionally include processing the backscattered wave data from each of the sensors collecting the scattered wave data to generate a two dimensional image of any anomaly. The method may further include presenting the two dimensional image of any anomaly.Type: GrantFiled: April 15, 2008Date of Patent: September 13, 2011Assignee: The Boeing CompanyInventor: Jeong-Beom Ihn
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Publication number: 20110192232Abstract: In the process of target stamping for fracture judgment, an acquisition unit acquires, as target data for fracture judgment, strain of a target die to be measured over the duration from the start time of stamping measured by strain measuring units to the finishing time of stamping, and also acquires production conditions typically by measurement. An extraction unit extracts the reference data, which gives the minimum total of differences between the production conditions of the reference data and the production conditions of the target data for fracture judgment, as the comparative data. A judging unit compares strain in the comparative data extracted by the extraction unit and strain in the target data for fracture judgment, and judges occurrence of a crack in a stamped product, if the maximum value of the difference is not smaller than a predetermined value.Type: ApplicationFiled: October 6, 2009Publication date: August 11, 2011Inventors: Takuya Kuwayama, Atsushi Seto, Noriyuki Suzuki
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Patent number: 7975557Abstract: A multiple testing system has plural testing units which are disposed independently, and a single information processing device. The testing unit has a frame, a loading mechanism supported at the frame and applying a desired load quantity on a test body, and a detector detecting a load quantity applied on the test body. By multitasking control and with respect to the testing units, the information processing device carries out: feedback control processing for, on the basis of a detected load quantity, controlling the loading mechanism such that the detected load quantity becomes a predetermined target value; control processing at an abnormal situation when at least one of an abnormality of the test body, an abnormality of the testing unit, or an abnormality of a power source of the loading mechanism, is detected; and interface processing with an operator.Type: GrantFiled: January 19, 2007Date of Patent: July 12, 2011Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Hiroshi Hohjo, Hajime Ikuno
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Patent number: 7940298Abstract: This invention comprises a system and a method for inspecting the inside of delayed petroleum coking vessels to determine deformations, detect and determine the severity of other defects and visually observe the inside of the inspected vessel.Type: GrantFiled: March 28, 2006Date of Patent: May 10, 2011Assignee: Custom Industrial Automation, Inc.Inventors: Richard D. Clark, Daryl K. Rutt, David J. Stratton
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Patent number: 7938016Abstract: An apparatus and method uses a die having at least one perimeter side with multiple pads. A structure is positioned between the at least one perimeter side and the multiple pads having multiple layers within the die. The structure functions as both a strain gauge and a crack stop. The structure arrests cracks from propagating from the at least one perimeter side to an interior of the die and provides an electrical resistance value as a function of an amount of strain existing where the structure is positioned. In another form the structure is implemented on a substrate such as a printed circuit board rather than in a semiconductor die.Type: GrantFiled: March 20, 2009Date of Patent: May 10, 2011Assignee: Freescale Semiconductor, Inc.Inventor: Thomas H. Koschmieder
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Patent number: 7921708Abstract: The object of the invention is to provide an alternative method for durability testing of an engine block. The engine block comprises cylinder cavities, which cylinder cavities are separated from each other by intermediate walls, each intermediate wall comprising a bolt hole. The method comprises the step of: removing a test specimen from an area of the intermediate wall of the engine block, such that the test specimen comprises the bolt hole.Type: GrantFiled: January 31, 2007Date of Patent: April 12, 2011Assignee: Scania CV AB (Publ)Inventors: Anders Jonsson, Göran Granqvist, Björn Rabenius, Jan Linder, Sven-Eric Stenfors
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Publication number: 20110005329Abstract: There is provided a fatigue test method with which the crack growth can be checked for a plurality of cycle rates in a single test. At a first cycle rate f1 of 0.01 Hz, hydrogen has a greater effect on crack growth than at a second cycle rate f2 of 1 Hz. As a result, an area of large hydrogen effect (an area developed at the cycle rate f1) and an area of small hydrogen effect (an area developed at the cycle rate f2) appear alternately on the fatigue fracture surface, and since these two areas have different fracture surface morphologies, it is possible to see the boundary lines. Consequently, the lengths of the cracks developed under each set of conditions can be specified, and a fatigue crack growth curve can be acquired for each set of conditions.Type: ApplicationFiled: January 9, 2009Publication date: January 13, 2011Inventors: Saburo Matsuoka, Yukitaka Murakami, Toshihiko Kanezaki
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Patent number: 7865315Abstract: A method for generating a calibration for a striation density model with respect to a material includes the steps of generating a first relationship between a striation density and a depth of a crack in a specimen comprising the material, generating a second relationship between the striation density and the depth of the crack in the specimen, and calculating an adjustment, based on a comparison between the first relationship and the second relationship.Type: GrantFiled: November 20, 2007Date of Patent: January 4, 2011Assignee: Honeywell International Inc.Inventors: Daniel J. Greving, Chris Desadier
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Patent number: 7840362Abstract: The life of a sensor unit is very strongly dependent on the loading of the sensor unit during use. The life of a sensor unit is generally specified in a number of loading cycles, however, which does not take into consideration the loading of the sensor unit. The invention therefore specifies a method and apparatus for assessing the residual life of a sensor unit which takes into consideration the actual loading of the sensor unit and therefore the residual life of the sensor unit can be estimated more precisely by virtue of a damage factor (S) being determined for the loading of a loading cycle (B) and the loading cycle (B) being weighted therewith.Type: GrantFiled: December 10, 2008Date of Patent: November 23, 2010Assignee: AVL List GmbHInventors: Norbert Mayrhofer, Klaus-Christoph Harms, Martin Rzehorska, Rüdiger Teichmann
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Patent number: 7816488Abstract: The PENT value for a resin may be estimated within ±10% by determining the % of heat flow to melt a fraction of a polymer above or below a set point and comparing it to a graph or algorithm of PENT values related to the % of heat flow to melt entire sample for a number of resins made using the same catalyst system. In a similar manner one may estimate the process conditions to prepare a polymer having a target PENT value based on the conditions used to prepare the samples for the graph or algorithms. The invention provides a simple procedure that may be used at a manufacturing site to estimate PENT values.Type: GrantFiled: April 29, 2008Date of Patent: October 19, 2010Assignee: Nova Chemicals (International) S.A.Inventors: Joo Wooi Teh, Joyce Lai-Ching Chau, Victoria Ker, Gary Yim
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Publication number: 20100236334Abstract: An apparatus and method uses a die having at least one perimeter side with multiple pads. A structure is positioned between the at least one perimeter side and the multiple pads having multiple layers within the die. The structure functions as both a strain gauge and a crack stop. The structure arrests cracks from propagating from the at least one perimeter side to an interior of the die and provides an electrical resistance value as a function of an amount of strain existing where the structure is positioned. In another form the structure is implemented on a substrate such as a printed circuit board rather than in a semiconductor die.Type: ApplicationFiled: March 20, 2009Publication date: September 23, 2010Inventor: Thomas H. Koschmieder
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Publication number: 20100222469Abstract: A method of selecting a crack resistant layer to be applied to an existing surface, the method comprising the steps of: selecting at least one bituminous binder to examine, where the bituminous binder comprises bitumen and one or more polymers, where the one or more polymers include a sufficient amount of conjugated diene such that at least 2.5% of the bituminous binder's weight comprises conjugated diene, preferably at least 3.0%. more preferably at least 3.5%, and most preferably 4.0%; forming at least one bituminous mixture comprising the bituminous binder and an aggregate; testing each bituminous binder for binder fracture energy properties; and selecting a bituminous binder for use in the crack resistant layer.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Applicant: SEMMATERIALS, L.P.Inventors: James J. Barnat, Phillip Blankenship, Richard Steger, Todd Lynn, Jason Bausano, Jehna Dent, Tim McKinney
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Publication number: 20100222467Abstract: A method of selecting a crack resistant layer to be applied to an existing surface, the method comprising the steps of: selecting at least one emulsified bituminous binder to examine, where the emulsified bituminous binder comprises bitumen, one or more emulsifier, and one or more polymers, where the one or more polymers, the one or more emulsifier, or both include a sufficient amount of conjugated diene such that at least 2.5% of the emulsified bituminous binder residuum weight comprises conjugated diene, preferably at least 3.0%, more preferably at least 3.5%, and most preferably 4.0%; forming at least one bituminous mixture comprising the emulsified bituminous binder and an aggregate; testing each bituminous mixture for mixture fracture energy properties; and selecting a emulsified bituminous binder for use in the crack resistant layer.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Applicant: SemMaterials, L.P.Inventors: James J. Barnat, Vince Vopat
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Publication number: 20100222468Abstract: A method of selecting a crack resistant layer to be applied to an existing surface, the method comprising the steps of: selecting at least one bituminous binder to examine, where the bituminous binder comprises bitumen and one or more polymers, where the one or more polymers include a sufficient amount of conjugated diene such that at least 2.5% of the bituminous binder's weight comprises conjugated diene, preferably at least 3.0%, more preferably at least 3.5%, and most preferably 4.0%; forming at least one bituminous mixture comprising the bituminous binder and an aggregate; testing each bituminous mixture for fatigue properties; and selecting a bituminous binder for use in the crack resistant layer.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Applicant: SEMMATERIALS, L.P.Inventors: James J. Barnat, Phillip Blankenship, Richard Steger, Todd Lynn, Jason Bausano, Jehna Dent, Tim McKinney
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Patent number: 7779691Abstract: A method for testing ball bearings includes applying a Hertzian contact stress on a ball bearing to provide a fracture of the ball bearing that releases acoustic energy, establishing a signal representing the acoustic energy, and identifying occurrence of the fracture based upon the signal.Type: GrantFiled: October 15, 2007Date of Patent: August 24, 2010Assignee: United Technologies CorporationInventors: Anindya Ghoshal, Ronald I. Holland, Herbert A. Chin, James L. Ambler, Leroy H. Favrow, Lucy M. Favrow, legal representative, David A. Haluck
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Publication number: 20100162825Abstract: The present invention provides a system and a method monitoring the health of structural joints by monitoring the strain developed near the joint due to perturbation applied away from that joint and comparing the monitored strain to strain which develops in a healthy joint due to comparable perturbation. The system for monitoring joints comprises: at least one near field strain measuring device installed near a monitored joint for monitoring the induced strain; at least one far field strain indicating device installed away from monitored joint indicating, measuring or producing the perturbation; and a data processor connected to said near field strain measuring device and to said near field strain measuring device for analyzing the response of the structure to the perturbation and determining the integrity of said joint. The method may also be used for detection and monitoring of off-joint crack initiation and edge delamination in composites.Type: ApplicationFiled: June 12, 2007Publication date: July 1, 2010Applicant: TECHNION RESEARCH AND DEVELOPMENT FOUNDATION LTD.Inventors: Baruch Karp, Daniel Rittel, David Durban
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Publication number: 20100154556Abstract: The disclosed subject matter provides a strain gauge which includes a composite film including a non-metallic matrix and magnetically active particles. At least a portion of the magnetically active particles form one or more chain structures, such that the resistivity of the composite film can vary in response to an applied strain on the composite film. The strain gauge also includes two or more leads affixed to the composite film and electrically coupled with the chain structures. Methods of fabrication and methods of use of the strain gauge based on chain-structured magnetically active particles included in a non-metallic matrix are also disclosed.Type: ApplicationFiled: December 23, 2009Publication date: June 24, 2010Inventor: Huiming Yin
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Publication number: 20100147694Abstract: A method of verifying performance of a coated part includes calculating a deflection value as a function of a predetermined strain threshold value and a total thickness of a test coupon that comprises a coating on a substrate. The coating of the test coupon is co-deposited in a deposition process for producing a coated part. The test coupon is bent in an amount equal to the calculated deflection value and then evaluated as an indication of whether a mechanical characteristic of the coated part meets a specified level.Type: ApplicationFiled: December 17, 2008Publication date: June 17, 2010Inventors: Aaron T. Nardi, Blair A. Smith
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Publication number: 20100126280Abstract: A weld inspection device is disclosed. The weld inspection device comprises a first annular engagement portion surrounding a central axis and a second annular engagement portion. The first annular engagement portion has a first holed segment extending circumferentially around an outer edge of the first annular engagement portion and having a first hole adapted to receive a threaded member and a standoff segment extending in a first direction along the central axis from the first holed segment, the standoff segment having a concavity. The second annular engagement portion surrounds the central axis and has a second holed segment extending circumferentially around the central axis and having a second hole adapted to receive and threadedly engage a threaded member, and a retaining flange extending radially inward toward the central axis.Type: ApplicationFiled: November 21, 2008Publication date: May 27, 2010Applicant: Honeywell International Inc.Inventor: Anh-Tuan Ngo
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Publication number: 20100116062Abstract: The precision of crack-propagation prediction is improved by taking into consideration a variation in the error due to inspectors and inspection methods. There is provided a crack-propagation prediction method including a correlation-information preparing step of measuring the length of a crack initiated in a test object by a plurality of inspectors and/or a plurality of inspection methods and obtaining correlation information between data acquired through the measurement and the condition of an actual crack; a crack-length estimating step of estimating the actual length of the crack initiated in an inspection target on the basis of the crack length measured by an inspector during inspection of the inspection target and the correlation information; and a crack-propagation-curve estimating step of estimating a crack-propagation curve of the inspection target originating from the crack length estimated in the crack-length estimating step.Type: ApplicationFiled: July 24, 2008Publication date: May 13, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoichi Sato, Koichi Morimura, Shinichiro Hori, Shintaro Kumano, Takanori Karato, Masato Kurita
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Patent number: 7712375Abstract: There is disclosed a method for measuring the strength of a honeycomb structure provided with an insertion hole preferably without generating any chipping. In the strength measuring method of the honeycomb structure, the strength is measured while a rubber plug is inserted into the insertion hole. The rubber plug has a hardness of 45 or more and 90 or less, a clearance between the inserted rubber plug and the inner surface of the insertion hole parallel to the depth direction of the insertion hole is 0.2 mm or more and 2.6 mm or less, and the protruding height of the inserted rubber plug from the peripheral surface of the honeycomb structure is 0.5 mm or more and 5 mm or less.Type: GrantFiled: January 21, 2009Date of Patent: May 11, 2010Assignee: NGK Insulators, Ltd.Inventors: Hideyuki Toyoshima, Takahiro Kondo
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Publication number: 20100018320Abstract: A method of predicting sheet formability at a microscale level includes the steps of providing a grid pattern on a test sheet, bulging the test sheet to a hemispherical shape until a crack is initiated on the surface of the test sheet, detecting the initiation of the crack, acquiring two images of the surface adjacent to the crack and calculating surface strains on the test sheet.Type: ApplicationFiled: July 23, 2008Publication date: January 28, 2010Inventors: Nasr A. Shuaib, Marwan K. Khraisheh
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Patent number: 7634383Abstract: There is provided a method for generating a probability distribution for a desired variable. A hyper parameter density function is provided, from which values are randomly selected. The selected hyper parameter value is used to compute an input variable value. A value is randomly selected from each input variable probability density function. These values are input into a physics model to compute an output value. This process is repeated to generate numerous output values, which are then used to construct an output value probability density function. After the output value probability density function is constructed, output value sensor data is obtained. The output density function is updated using the sensor data and a probabilistic evaluation of the hyper parameters. Improved predictions are iteratively made with the updated output distribution.Type: GrantFiled: July 31, 2007Date of Patent: December 15, 2009Assignee: Northrop Grumman CorporationInventors: Stephen J. Engel, David H. Hoitsma
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Patent number: 7620503Abstract: A fault detection system designed to evaluate the structural integrity of a material employs an array of sensors disposed over the material being evaluated. The sensors detect vibrations in the material and the sensor signals are fed to a data processor. The processor employs a method to analyze the linear and nonlinear characteristics of the sensor signals and then determines whether to proceed with a linear signal processing analysis or a nonlinear signal processing analysis of the sensor signals. Once the analysis is completed, the results are compared to baseline results to determine what if any divergence exists between the results and the baseline results. A significant divergence indicates a potential material failure. The fault detection system will indicate such a potential failure through a visual alarm on a graphical user interface.Type: GrantFiled: July 13, 2007Date of Patent: November 17, 2009Assignee: The United States of America as represented by the Secretary of the NavyInventors: Derke R. Hughes, Richard A. Katz, Albert H. Nuttall
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Publication number: 20090187353Abstract: An element damage determination unit calculates a cumulative value of a damage value using a Manson-Coffin law for a plurality of finite elements of a continuum based on a result of a stress/distortion analyzing process, and determines whether or not the cumulative value of the damage value is equal to or exceeds a threshold. A calculation unit obtains first correspondence information indicating the correspondence between the number of cycles of a load and a growth rate of a crack occurring in the continuum based on the determination result. A Manson-Coffin law change unit changes a Manson-Coffin law based on the first correspondence information and second correspondence information indicating the correspondence between an actual measurement value of the number of cycles of a load applied to the continuum and an actual measurement value of the growth rate of a crack occurring in the continuum at that time.Type: ApplicationFiled: October 30, 2008Publication date: July 23, 2009Applicants: FUJITSU LIMITED, FUJITSU TEN LIMITEDInventors: Hidehisa Sakai, Katsufumi Morimune, Masanori Motegi, Tsutomu Iikawa
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Patent number: 7559250Abstract: A method for detecting a crack in a frame is disclosed. The method includes sensing with a first pressure sensor a first pressure within a first sealed cavity. The first sealed cavity is interior to a first structure of the frame. Additionally, the method includes detecting a first change in the sensed first pressure. The method also includes determining preliminarily that a crack has formed in the first structure based on the detected change in the sensed first pressure. In addition, the method includes determining a criticality of the crack.Type: GrantFiled: September 27, 2007Date of Patent: July 14, 2009Assignee: Caterpillar Inc.Inventors: Kris Edward Seitz, Troy Allen Shawgo
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Publication number: 20090133381Abstract: An apparatus for testing failure of a material used in a jet engine, and more particularly to an apparatus that uses one or more model jet engine components made from a material used in a full-size jet engine and desired to be tested. The apparatus permits easy removal and disassembly of a jet engine mounted thereon as well as real-time measurements of run-time parameters. The methods and apparatus provide for predicting and analysing failure by a number of fatigue-related mechanisms including creep, fatigue, crack growth, foreign object damage, fretting, erosion, and stress corrosion.Type: ApplicationFiled: January 14, 2008Publication date: May 28, 2009Applicant: Vextec CorporationInventors: Richard Holmes, Robert G. Tryon, III, John E. Pope, Daniel A. Nasser, Michael Oja, Animesh Dey, Jesse Hamler, Jonathan Brooks, James Tryon
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Publication number: 20090116533Abstract: A method and apparatus is described for enabling the testing and evaluation of industrial machine components and, in particular, gas turbine engine components, under simulated in-situ thermal operating conditions for effectively evaluating new component designs and repair techniques. A specimen machine component/part is placed in a test chamber and cyclically heated and cooled while being monitored to obtain information regarding the initiation and propagation of a crack within the structure of the component. Information regarding the number of heating and cooling cycles sustained by the component until crack initiation and information indicating the rate of crack propagation are acquired and compared over multiple heating-cooling cycles to evaluate components and repair techniques.Type: ApplicationFiled: November 2, 2007Publication date: May 7, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Matthew J. O'Connell, Christopher E. Thompson, Paul S. Dimascio
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Patent number: 7520178Abstract: A method for inspecting a honeycomb fired body includes transporting the honeycomb fired body along a transportation line, and inspecting the honeycomb fired body for a crack during the transporting step.Type: GrantFiled: May 17, 2007Date of Patent: April 21, 2009Assignee: Ibiden Co., Ltd.Inventors: Kazushige Ohno, Koji Shimato, Norihiko Yamamura
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Patent number: 7519481Abstract: A method and system for selecting fluids for compatibility with specified metals exposed to oil field environments. Metal specimens are tested for corrosion and/or cracking behavior by exposing them to fluids under stressful test conditions. The testing is conducted under variable temperature, pressure, pH, fluid density, metallurgical stress, additives, cover gases and combinations thereof. The results from the stress testing are stored in a database. The test results are evaluated using encoded logic embedded in software media. Fluid compatibility evaluation software, developed from the stress test results, is executed to determine the cracking susceptibility of metals exposed to fluids under stressful conditions. A cracking susceptibility index can be developed to provide a quantitative indicator of cracking susceptibility. Fluid recommendation reports utilize the cracking susceptibility index values to rank compatible fluids. The reports also list optional additives to be used with the fluids.Type: GrantFiled: September 11, 2006Date of Patent: April 14, 2009Inventors: Glenn Perrin, Jeffrey McKennis, Thomas S. Carter, Surendra K. Mishra
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Patent number: 7516674Abstract: A method for measuring the fracture and fatigue crack growth behavior of a material includes heating at least one sample having a first end and a second end and a pre-applied crack between the first end and the second end; heating a fixture having a lower coefficient of thermal expansion than said at least one sample; attaching the first end and the second end of the at least one sample to the fixture; cooling the at least one sample and fixture; recording the temperature at which propagation of the pre-applied crack through the width of the at least one sample occurs as the critical fracture temperature; for a plurality of samples, each sample having a different ratio of pre-applied crack length to sample width, determining the critical fracture temperature as a function of said ratio; and ranking materials by the critical fracture temperature.Type: GrantFiled: August 26, 2008Date of Patent: April 14, 2009Assignee: International Business Machines CorporationInventors: Claudius Feger, Soojae Park