Abstract: A device and method for testing bearing capacity of single-row grouped pillars in a horizontal goaf under biaxial loading is disclosed. Four fixed rings are arranged on testing machine base, and have stands installed therein respectively, bottom ends of the stands are connected with the base, top ends are connected with transverse frame, sliding rails are arranged on two sides of the base; the vertical force loading devices are arranged at a lower part of transverse frame and the horizontal force loading devices are arranged at inner sides of side frame. Simultaneous loading on multiple coal samples, rock samples, filling body samples, concrete samples, coal-filling samples and/or rock-filling samples can be achieved, the overall bearing capacity of a single-row group pillar system in the horizontal goaf under the biaxial compression condition can be obtained, and the mutual influence relation between grouped pillar individuals in the horizontal goaf can be attained.

Abstract: Devices and methods relating stretchable electronics are disclosed. Some disclosed embodiments relate to a stretchable electronic film comprising an insulating polymer and less than 1 wt % of a semiconducting polymer. Other disclosed embodiments relate to manufacturing a multi-layered, stretchable electronic device characterized by a single peel-off step for integrating all components of the device rather than a multi-peel synthesis of the device.

Abstract: Provided is a system for testing a material, including a testing device configured to apply a physical test to a material and including sensors configured to measure parameters of the material, at least one processor in communication with the testing device programmed or configured to: select a test specimen, automatically set-up the testing device for at least one test, generate test data based at least partially on the parameters measured by the sensors, and communicate the test data to a remote system, at least one server computer remote from the testing device and the at least one processor, the at least one server computer programmed or configured to: send specimen and test parameter data, receive the test data and store the test data in a database in association with at least one identifier that uniquely identifies the testing device, and prevent modification of the test data stored in the database.

Abstract: The invention pertains to performing bonding strength testing between a test material and a container. A sample preparation device to make a test sample was disclosed. This device included a container with an insert on each end. The inserts have a portion that protrudes into the container. When test material is added to the sample preparation device, a groove was formed in test sample. These grooves reduce the amount of boundary effects that are present during testing. A system and method for performing bond strength testing was also disclosed. In this system, a test sample was formed using the sample preparation device. This is placed upon a support and a half-spherical force applier is placed on top of the test sample. A press is used to apply force to the force applier and indirectly to the test sample.

Abstract: An improved apparatus and method for fillet punch creep testing of a small specimen comprises, in one implementation, a testing unit secured to a top end and a bottom end of a structural support unit, and configured to conduct creep testing on a specimen. The testing unit includes a loading unit, a fillet punch unit, a thermal unit, and a measuring unit. A filleted punch of the fillet punch unit transfers an applied pressure from the loading unit to the specimen clamped between an upper die and a filleted lower die of the fillet punch unit while the thermal unit surrounds the fillet punch unit, and heats the specimen during testing. The optimized filleted edges on the filleted punch and the filleted lower die eliminate stress concentration against the specimen resulting in stable measurements, and thus, reduce the dispersion of applied load during creep testing.

Abstract: A ring shear and seepage-coupled apparatus and a ring shear and seepage-coupled test system for rock and rock fracture under tension or compression stress are provided, relating to the technical field of mechanical testing devices. As to the ring shear and seepage-coupled apparatus, an axial piston rod is connected with an upper shear box, a torque transferring shaft is connected with a lower shear box, an axial force transducer is provided on the axial piston rod, a torque transducer is provided on the torque transmitting shaft, and a force transferring plate is fixedly connected onto the upper shear box. The force transferring plate is able to transmit a counter force for exerting a torque. Radial and circumferential seepage tests can be achieved by providing a seepage structure. The ring shear and seepage-coupled test system comprises a servo pump and the ring shear and seepage-coupled apparatus as mentioned above.

Abstract: A force detecting device includes an installed member that is installed on an installing face and a force sensor main unit that is fixed to a top face of the installed member. The installed member has a plate-shaped or brim-shaped first portion having the top face and extending at least in a horizontal direction; a second portion extending at least downward from a bottom face side of the first portion; and a third portion extending at least in the horizontal direction from the second portion and fixed to the installing face, and a gap SP in a top-down direction is formed between the first portion and the third portion.

Abstract: An electromagnetic multiaxial fatigue testing machine includes a test piece fixing platform and an electromagnet loading mechanism arranged on a frame, wherein the electromagnet loading mechanism includes a first loading device for bend loading, and a second loading device for axial and torsional loading. The first loading device includes a first permanent magnet and a first electromagnet with a direction of a magnetic force generated therebetween is orthogonal to an axial direction of a test piece; the second loading device includes a second permanent magnet and a second electromagnet mounted on a swinging pair with a direction of a magnetic force generated therebetween is parallel to the axial direction of the test piece.

Abstract: A cartridge suitable for use in a bond testing machine includes a plurality of a different test tools. A rotary mechanism is provided and each of the plurality of different test tools is mounted to the rotary mechanism angularly spaced from one another. A drive unit is coupled to the rotary mechanism and is configured to rotate the rotary mechanism to move each of the plurality of different test tools to and from a use position. An air interface receives compressed air from a corresponding air interface on a positioning assembly of the bond testing machine.

Abstract: A fatigue testing system provides simultaneous cycle testing for a plurality of prosthetic devices under simulated physiological loading conditions. A plurality of sample holders containing test samples of prosthetic devices is positioned between a distribution chamber and a return fluid chamber to form an integrated test chamber. A reciprocating linear drive motor operates a rolling bellows diaphragm to cyclically pressurize fluid within the test chamber and drive the pressurized fluid through the prosthetic devices being tested. The test chamber defines a return flow conduit in fluid communication with each of the sample holders, the return fluid chamber, and the distribution chamber. Compliance chambers and throttle valves associated with each of the sample holders regulate the pressure gradient and back pressure across the prosthetic devices being tested.

Abstract: A valve stem connector comprises a first half and a second half, each of which includes a top section adapted to receive a portion of an actuator and a bottom section adapted to receive a portion of a valve stem. A plurality of cut-away sections is disposed in each of the first and second halves, and a pair of shear web installation sites is disposed between the plurality of cut-away sections on each of the first and second halves. A force measurement device is disposed in each shear web installation site of the pair of shear web installation sites, the force measurement device for measuring the strain on the valve stem. Each shear web installation site has a shear strain measurable by the force measurement device, and the plurality of cut-away sections allows for a bending beam near each pocket to minimize deflection.

Abstract: Methods are disclosed relating to the assessment of fatigue damage in objects that include for example, subjecting a fatigued object to a cyclic mechanical stress, measuring a rate of temperature rise in the fatigued object, and assessing a degree of fatigue of the fatigued object based on the rate of temperature rise in the fatigued object. Methods of measuring internal structural characteristics and methods of correlating fatigue damage to results from excitation tests are also taught.

Abstract: A test fixture for determining circumferential shear properties of an arcuate test specimen may include an outer fixture and an inner fixture. The outer fixture may be coupled to an outer side of the test specimen, and may be rotatably mounted on a central pin and may include a rocker arm. The inner fixture may be coupled to an inner side of the test specimen, and may be rotatably mounted on the central pin and may include a load arm extending in a direction opposite the rocker arm. The inner fixture and the outer fixture may be configured such that application of a test load to the rocker arm and the load arm causes rotation thereof about the central pin producing circumferential movement of the inner side relative to the outer side and inducing a circumferential shear load in the test specimen.

Abstract: A control device includes a force detector configured to detect a force in a normal direction and a force in a shearing direction of fingertips of a robot hand device respectively as a normal force and a shearing force, and an object detector configured to calculate a friction coefficient using the normal force and the shearing force detected by the force detector and to detect whether or not a thin-film object having a maximum friction coefficient different from a maximum stationary friction coefficient between the fingertips is grasped between the fingertips on the basis of the calculation result.

Abstract: In one version of the invention, an apparatus intended for determining the disintegration time of rapidly disintegrating tablets is designed with a disintegration cell having two liquid inlets and outflow from the top. Visualization of tablet inside the disintegration cell is conducted using a camera aided by a base light source and images captured using a computer or any other recording system. Disintegration medium is introduced into the disintegration cell through both inlets to produce a swirling motion and images of the tablet disintegration process are captured. The captured images are analyzed in real-time or off-line, to determine the tablet disintegration time. A visual non-recording method using projected image may also be used.

Abstract: Shear force and pressure on a structure are simultaneously monitored using signals received from antennas on the structure. The shear force on the structure is monitored using a signal received from a patch antenna on the structure, and the pressure on the structure is monitored using a signal received from a loop antenna on the structure.

Abstract: Systems and methods provide for testing a cement by measuring both axial shrinkage/expansion and radial shrinkage/expansion of a sample.

Abstract: Methods and systems to method to determine an adhesion force of an underfill material to a chip assembled in a flip-chip module are provided. A method includes forming a flip-chip module including a chip connected to a substrate with a layer of underfill material adhered to the chip and the substrate. The method also includes forming a block from the layer of underfill material. The method further includes measuring a force required to shear the block from a surface of the flip-chip module.

Abstract: A pressure and shear force measurement device and a pressure and shear force measurement method are disclosed. The measurement device includes a flexible substrate; a plurality of signal outputting units embedded in the flexible substrate for outputting signals; and a plurality of signal detectors disposed at a peripheral of the flexible substrate for receiving at least a signal outputted from the signal outputting units, wherein when the flexible substrate has a load applied thereon and each of the signal outputting units has a displacement, each of the signal detectors detects a pressure and a shear force resulting from the load on the flexible substrate based on the signal received from the signal outputting units.

Abstract: System and method for using an apparatus for measuring shear strength and viscosity of sediments that extend both the maximum rotational rate attainable and the maximum torque sustainable, and include a high data acquisition rate and data storage. The apparatus can accurately measure, for example, but not limited to, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow (including hardening and softening) characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of the vane sensor.

Abstract: An apparatus for measuring characteristics of a specimen. The apparatus can accurately measure, for example, but not limited to, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow (including hardening and softening) characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of the vane sensor.

Abstract: System and method for manufacturing an apparatus for measuring shear strength and viscosity of sediments that extends both the maximum rotational rate attainable and the maximum torque sustainable, and includes a high data acquisition rate and data storage. The apparatus can accurately measure, for example, but not limited to, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow (including hardening and softening) characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of the vane sensor.

Abstract: A method of selecting a commercially viable chewing gum including testing a chewing gum using nonlinear rheology, compiling rheological data from the nonlinear rheology, and then comparing the rheological data obtained to rheological data ranges of commercially acceptable chewing gum. The nonlinear rheology can include large amplitude oscillatory shear test, start-up of steady uniaxial extension test, and uniaxial compression test (lubricated or unlubricated) and relaxation.

Abstract: A device for measuring deformation including: a) at least one strain gauge, producing a signal following a deformation, positioned on a face of a flexible support favoring elongation of the strain gauge, the face opposite the strain gauge of the flexible support, which is configured to be brought into contact with, or glued to, a test body with the deformation desired to be measured; b) at least one first substrate, including at least signal processor and/or signal transmission device; c) a securing mechanism to assemble the strain gauge and the first substrate mechanically, including an elastic layer of material having elastic properties positioned between the gauge and the first substrate, the elastic layer preventing deformation of the gauge from being transmitted, or be transmitted as little as possible, to the first substrate.

Abstract: A shear force detection device for detecting a shear force includes: a support body including an opening defined by a pair of straight parts perpendicular to a detection direction of the shear force and parallel to each other; a support film on the support body and closing the opening, the support film having flexibility; a piezoelectric part on the support film and extending astride an inside and outside of the opening and along at least one of the pair of straight parts of the opening when viewed in a plane in which the support body is seen in a substrate thickness direction, the piezoelectric part being bendable to output an electric signal; and an elastic layer covering the piezoelectric part and the support film.

Abstract: A shear force detection device for detecting a shear force includes: a support body including an opening defined by a pair of straight parts perpendicular to a detection direction of the shear force and parallel to each other; a support film on the support body and closing the opening, the support film having flexibility; a piezoelectric part on the support film and extending astride an inside and outside of the opening and along at least one of the pair of straight parts of the opening when viewed in a plane in which the support body is seen in a substrate thickness direction, the piezoelectric part being bendable to output an electric signal; and an elastic layer covering the piezoelectric part and the support film.

Abstract: The present invention related to a method, and an apparatus arrangement, for determining a fatigue limit for rolling contact initiated fatigue of a rolling bearing. The method comprises running a rolling bearing while being exerted to a load which generates sub-surface transformations in a rolling element contact zone of the outer or inner ring. Furthermore a set of sub-surface transformations in the contact zone along a raceway portion of the rolling bearing is identified and measured and used for generation of a parameter data set, wherein a fatigue parameter value representative of a predicted fatigue limit for the rolling bearing is determined based on the generated data set of sub-surface transformations.

Abstract: Apparatus tests the performance of joints between an attachment and a beam having a pair of caps connected by a corrugated web. The apparatus includes first and second grips contoured to the shape of a portion of the corrugated web for gripping the web. A force applicator coupled with the attachment and the grips applies force to the beam through the joint.

Abstract: A shear test device for testing the strength of attachment between a bond and an electronic substrate. The device incorporates a clamping mechanism and a shear test tool that are mounted on a baseplate. During a set-up procedure, the shear test tool is movable relative to the baseplate. During a test procedure, the shear test tool is clamped by the clamping mechanism in a fixed position relative to the baseplate. At least one abutment is provided that is fixed in position relative to the baseplate. During the test procedure, a drive mechanism provides relative movement between the shear test tool and the bond to cause the shear test tool to shear the bond off the substrate. The at least one abutment provides an additional clamping force on the test tool while the test tool is shearing the bond off of the substrate.

Abstract: Described is a material sample for testing material properties under biaxial load as well as a method therefor. The material sample has a circular disk shape and, for rotation about the center line thereof, is provided with an integrally formed hub. The edge of the material sample and the hub are thicker than the ring section of the material sample located in between. In one embodiment, the ring section is designed with an annular concave fillet concentric to the hub and the concave fillet may extend from the edge to the hub and have a continuous curvature over its width. In the method, it is rotated about its center line at least at 100,000 rpm, preferably at 150,000 rpm±10,000 rpm.

Abstract: A method of improving processing of polyethylene resins comprising obtaining a plurality of multimodal metallocene-catalyzed polyethylene samples measuring the shear stress as a function of shear rate for the plurality of multimodal metallocene-catalyzed polyethylene samples using capillary rheometry wherein the measuring yields values for a magnitude of slip-stick, a stress for smooth to matte transition, and a shear rate for smooth to matte transition; and identifying from the plurality of multimodal metallocene-catalyzed polyethylene samples individual multimodal metallocene-catalyzed polyethylene resins having a reduced tendency to melt fracture characterized by a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s?1.

Abstract: An apparatus for measuring characteristics of a specimen. The apparatus can accurately measure, for example, but not limited to, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow (including hardening and softening) characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of the vane sensor.

Abstract: System and method for using an apparatus for measuring shear strength and viscosity of sediments that extend both the maximum rotational rate attainable and the maximum torque sustainable, and include a high data acquisition rate and data storage. The apparatus can accurately measure, for example, but not limited to, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow (including hardening and softening) characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of the vane sensor.

Abstract: System and method for measuring shear strength and viscosity of sediments that extends both the maximum rotational rate attainable and the maximum torque sustainable, and includes a high data acquisition rate and data storage. Also a method of making an apparatus, and method of using the apparatus for accurately measuring, peak, evolution, and residual values of the undrained shear strength, yield, and viscous and plastic flow characteristics of cohesive sediments at various pre-set and variable values of the rotational velocity of a vane sensor.

Abstract: A control device includes a force detector configured to detect a force in a normal direction and a force in a shearing direction of fingertips of a robot hand device respectively as a normal force and a shearing force, and an object detector configured to calculate a friction coefficient using the normal force and the shearing force detected by the force detector and to detect whether or not a thin-film object having a maximum friction coefficient different from a maximum stationary friction coefficient between the fingertips is grasped between the fingertips on the basis of the calculation result.

Abstract: A shear test device for testing the strength of attachment between a bond and an electronic substrate. The device incorporates a clamping mechanism and a shear test tool that are mounted on a baseplate. During a set-up procedure, the shear test tool is movable relative to the baseplate. During a test procedure, the shear test tool is clamped by the clamping mechanism in a fixed position relative to the baseplate. At least one abutment is provided that is fixed in position relative to the baseplate. During the test procedure, a drive mechanism provides relative movement between the shear test tool and the bond to cause the shear test tool to shear the bond off the substrate. The at least one abutment provides an additional clamping force on the test tool while the test tool is shearing the bond off of the substrate. Strain gauges associated with the shear test tool provide signals to an electric circuit indicating the strength of attachment between the bond and the substrate.

Abstract: A shear force detection device for detecting a shear force includes: a support body including an opening defined by a pair of straight parts perpendicular to a detection direction of the shear force and parallel to each other; a support film on the support body and closing the opening, the support film having flexibility; a piezoelectric part on the support film and extending astride an inside and outside of the opening and along at least one of the pair of straight parts of the opening when viewed in a plane in which the support body is seen in a substrate thickness direction, the piezoelectric part being bendable to output an electric signal; and an elastic layer covering the piezoelectric part and the support film.

Abstract: Apparatus tests the performance of joints between an attachment and a beam having a pair of caps connected by a corrugated web. The apparatus includes first and second grips contoured to the shape of a portion of the corrugated web for gripping the web. A force applicator coupled with the attachment and the grips applies force to the beam through the joint.

Abstract: A method includes positioning a layer of adhesive between a first structural component and a second structural component, positioning a first evaluation film between the first structural component and the layer of adhesive, curing the adhesive at least partially, separating the first structural component and the first evaluation film by a relative movement therebetween, and inspecting bond line quality of the adhesive.

Abstract: A tack adhesion testing device for quantitatively measuring tack adhesion between a material and an object with a planar surface for contact with the material. The device has a material mount for mounting a quantity of the material such that the quantity of material presents an exposed flat face, an object mount for securely holding the object such that the planar surface is in flat contact with the exposed flat surface, the material mount and the object mount being movable relative to each other, a contact force applicator for applying a known force urging the exposed flat face and the planar surface into contact and, separation mechanism for applying a variable force to the material mount and the object mount to slide the flat face and the planar surface relative to each other such that the variable force can be increased until the flat face and the planar surface slide relative to each other.

Abstract: System and method for measuring shear strength and viscosity of sediments that extends both the maximum rotational rate attainable and the maximum torque sustainable, and includes a high data acquisition rate and data storage.

Abstract: Apparatus tests the performance of joints between an attachment and a beam having a pair of caps connected by a corrugated web. The apparatus includes first and second grips contoured to the shape of a portion of the corrugated web for gripping the web. A force applicator coupled with the attachment and the grips applies force to the beam through the joint.

Abstract: A test fixture for simultaneously testing two material test samples is provided. The fixture provides substantially equal shear and tensile stresses in each test specimens. By gradually applying a load force to the fixture only one of the two specimens fractures. Upon fracture of the one specimen, the fixture and the load train lose contact and the second specimen is preserved in a state of upset just prior to fracture. Particular advantages of the fixture are (1) to control the tensile to shear load on the specimen for understanding the effect of these stresses on the deformation behavior of advanced materials, (2) to control the location of fracture for accessing localized material properties including the variation of the mechanical properties and residual stresses across the thickness of advanced materials, (3) to yield a fractured specimen for strength measurement and an unfractured specimen for examining the microstructure just prior to fracture.

Abstract: A composition that will automatically flow (auto-flow) and form a fillet (self-fillet) will have a yield stress within the range of 1.8 Pa to 10 Pa (20 dynes/cm2 to 100 dynes/cm2). Such a composition can be designed by using an appropriate choice of filler, regardless of the resin system used in the composition.

Abstract: An apparatus for adhering coupons together for adhesive shear testing may include a first member, a second member, at least one alignment device, and at least one separation device. The first member may have at least one first member cavity for holding at least one first member coupon. The second member may have at least one second member cavity for holding an overlapping area of at least one second member coupon adjacent to and separate from the at least one first member coupon. The overlapping area of the at least one second member coupon may be adhered to the at least one first member coupon. The at least one alignment device may control a size of the overlapping area. The at least one separation device may control a separation distance between the overlapping area of the at least one second member coupon and the at least one first member coupon.

Abstract: A shear test device for testing the strength of attachment between a bond and an electronic substrate. The device incorporates a clamping mechanism and a shear test tool that are mounted on a baseplate. During a set-up procedure, the shear test tool is movable relative to the baseplate. During a test procedure, the shear test tool is clamped by the clamping mechanism in a fixed position relative to the baseplate. At least one abutment is provided that is fixed in position relative to the baseplate. During the test procedure, a drive mechanism provides relative movement between the shear test tool and the bond to cause the shear test tool to shear the bond off the substrate. The at least one abutment provides an additional clamping force on the test tool while the test tool is shearing the bond off of the substrate. Strain gauges associated with the shear test tool provide signals to an electric circuit indicating the strength of attachment between the bond and the substrate.

Abstract: Method for determining the intrinsic gel strength of a water-absorbing hydrogel-forming polymeric material, comprising the step of: obtaining a hydrogel of said water-absorbing polymeric material, submitting said hydrogel to a controlled strain application step and measuring the stress; or submitting said hydrogel to a controlled stress application step and measuring the strain, and determining from said measured stress or strain of step c) the modulus of said hydrogel.

Abstract: A high speed ball shear machine is adapted for removing a metal bump fixed on a substrate. The high speed ball shear machine includes a fixing base, a shear tool, and a metal bump catcher. The substrate is fixed on the top surface of the fixing base. The shear tool is disposed above the top surface. The fixing base is adapted for being translated along a translation path relative to the shear tool, wherein the translation path is a straight path. When the fixing base translates along the path, the metal bump is driven to strike the shear tool so as to separate itself from the substrate. The metal bump catcher, which is adapted for catching the drop bump after the striking, is disposed on the side wall of the fixing base. The bump catcher has a fillister with a configuration depicted in the figures of this invention.

Abstract: A micro sized multi-axis semiconductor skin friction/wall shear stress induced by fluid flow. The sensor design includes a shear/strain transduction gimble connected to a force collecting plate located at the flow boundary surface. The shear force collecting plate is interconnected by an arm to offset the tortional hinges from the fluid flow. The arm is connected to the shear force collecting plate through dual axis torsional hinges with piezoresistive torsional strain gauges. These gauges are disposed on the tortional hinges and provide a voltage output indicative of applied shear stress acting on the force collection plate proximate the flow boundary surface. Offsetting the torsional hinges creates a force concentration and resolution structure that enables the generation of a large stress on the strain gauge from small shear stress, or small displacement of the collecting plate. The design also isolates the torsional sensors from exposure to the fluid flow.

Abstract: The present invention is related to a sensor for simultaneously measuring both normal and shear forces applied to two or more flexible sensors, and further a statically responsive sensor for measuring shear forces. The present invention further includes a method of designing an object, prototype or a device using these sensors to detect both shear and normal forces encountered at the sensor locations.