Abstract: A method of evaluating the accuracy of a plurality of stress scaling methods to a proposed blended airfoil includes the steps of 1) receiving nominal finite element nodal results and nominal computational fluid dynamic results for an undamaged airfoil, to reach a nominal undamaged airfoil physical response, 2) applying a plurality of stress scaling methods to a proposed blended airfoil to determine a blended airfoil physical response to reach a predicted physical response for each of the plurality of stress scaling methods and 3) providing rig test measured actual stress responses on airfoils with a similar blend, comparing the rig test response to the predicted blended airfoil physical responses to evaluate the accuracy of each of the stress scaling methods.

Abstract: A system for evaluating fatigue for a component design may be collectively operable to execute an evaluation environment, which may be operable to access a baseline component design associated with a baseline component. A baseline set of finite elements may be associated with a volume of the baseline component design. The evaluation environment may be operable to access a second component design associated with a second component. A second set of finite elements may be associated with a volume of the second component design. The evaluation environment may be operable to calculate at least one stress-based MAC value for the second component design based a comparison between nodal stresses associated with respective corner nodes of the baseline set of finite elements and nodal stresses associated with respective corner nodes of the second set of finite elements. A method for evaluating fatigue for a component design is also disclosed.

Abstract: A process for scheduling engine inspection for a gas turbine engine includes computing an expected damage increment based on aircraft usage data of a single flight, computing a cumulative expected damage by summing the expected damage increment with a total set of historical expected damage increments since a previous maintenance, and determining an aggregate risk of failure based on the computed cumulative expected damage. A manual inspection is signaled when the aggregate risk of failure exceeds an acceptable risk threshold.

Abstract: A process for scheduling engine inspection for a gas turbine engine includes computing an expected damage increment based on aircraft usage data of a single flight, computing a cumulative expected damage by summing the expected damage increment with a total set of historical expected damage increments since a previous maintenance, and determining an aggregate risk of failure based on the computed cumulative expected damage. A manual inspection is signaled when the aggregate risk of failure exceeds an acceptable risk threshold.

Abstract: A method for sequencing veneer to lumbercore includes receiving a veneer grain width input and a veneer thickness input, determining a cut angle based on the veneer grain width input and the veneer thickness input, receiving a lumbercore width input and a lumbercore height input, determining a set of dimensions for a stack of lumber, and generating a template mapping the lumbercore to the stack of lumber, where the template is based on the lumbercore width input, the lumbercore height input, and the set of dimensions for the stack of lumber, where the lumbercore is rotated within the template at an angle relative to horizontal within the stack of lumber by an amount equal to the cut angle.

Abstract: A method for sequencing veneer to lumbercore includes receiving a veneer grain width input and a veneer thickness input, determining a cut angle based on the veneer grain width input and the veneer thickness input, receiving a lumbercore width input and a lumbercore height input, determining a set of dimensions for a stack of lumber, and generating a template mapping the lumbercore to the stack of lumber, where the template is based on the lumbercore width input, the lumbercore height input, and the set of dimensions for the stack of lumber, where the lumbercore is rotated within the template at an angle relative to horizontal within the stack of lumber by an amount equal to the cut angle.

Abstract: A novel probabilistic method for analyzing high cycle fatigue (HCF) in a design of a gas turbine engine is disclosed. The method may comprise identifying a component of the gas turbine engine for high cycle fatigue analysis, inputting parametric data of the component over a predetermined parameter space into at least one computer processor, using the at least one computer processor to build a plurality of flexible models of the component based on the parametric data of the component over the predetermined parameter space, using the at least one computer processor to build a plurality of emulators of the component based on the plurality of flexible models, and using the at least one computer processor to predict a probability of HCF based at least in part on the parametric data of the component over the predetermined parameter space and the plurality of emulators.

Abstract: A novel probabilistic method for analyzing high cycle fatigue (HCF) in a design of a gas turbine engine is disclosed. The method may comprise identifying a component of the gas turbine engine for high cycle fatigue analysis, inputting parametric data of the component over a predetermined parameter space into at least one computer processor, using the at least one computer processor to build a plurality of flexible models of the component based on the parametric data of the component over the predetermined parameter space, using the at least one computer processor to build a plurality of emulators of the component based on the plurality of flexible models, and using the at least one computer processor to predict a probability of HCF based at least in part on the parametric data of the component over the predetermined parameter space and the plurality of emulators.

Abstract: A disclosed airfoil health monitoring system and method obtains a signal comprising a waveform indicative of an airfoil path with a sensor. Features of the waveform are determined and compared waveform characteristics indicative of a vibrational mode. A vibrational mode of the airfoil may then be determined based on the comparison between the predetermined waveform characteristics and the obtained waveform indicative of the airfoil path.

Abstract: The present invention relates to synthesis of HBSAg in yeast. Yeast expression vectors comprising a yeast promoter, ADH1, have been constructed. The region of the HBV genome coding for the S-protein, excluding a possible 163 amino acid presequence, has been transferred to the yeast expression vector. Using the described yeast vector, the successful synthesis of HBSAg by yeast has been achieved. The product is antigenic (reactive with anti-HBSAg), and a substantial portion is found associated with particles identical in electron microscopic appearance to those found in the serum of HBV-infected patients and in Alexander cells but having a smaller particle size diameter. The HBSAg synthesized by yeast has identical sedimentation behavior to purified, naturally occurring HBSAg particles purified from Alexander cells as measured by sucrose gradient sedimentation.

Abstract: The present invention relates to synthesis of HBsAg in yeast. Yeast expression vectors comprising a yeast promoter, ADH1, have been constructed. The region of the HBV genome coding for the S-protein, excluding a possible 163 amino acid presequence, has been transferred to the yeast expression vector. Using the described yeast vector, the successful synthesis of HBsAg by yeast has been achieved. The product is antigenic (reactive with anti-HBsAg), and a substantial portion is found associated with particles identical in electron microscopic appearance to those found in the serum of HBV-infected patients and in Alexander cells but having a smaller particle size diameter. The HBSAg synthesized by yeast has identical sedimentation behavior to purified, naturally-occurring HBsAq particles purified from Alexander cells as measured by sucrose gradient sedimentation.

Abstract: DNA expression vectors capable, in a transformant strain of yeast, of expressing a polypeptide under the control of a genetically distinct yeast promoter, processes of forming transformant strains of yeast and transformed yeast strains are disclosed.

Abstract: DNA expression vectors capable, in a transformant strain of yeast, of expressing a polypeptide under the control of a genetically distinct yeast promoter, processes of forming transformant strains of yeast and transformed yeast strains are disclosed.

Abstract: DNA expression vectors capable, in a transformant strain of yeast, of expressing a polypeptide under the control of a genetically distinct yeast promoter, processes of forming transformant strains of yeast and transformed yeast strains are disclosed.

Abstract: A DNA expression vector capable, in a transformant strain of yeast, of expressing a biologically competent polypeptide ordinarily exogenous to yeast under the control of a genetically distinct yeast promoter, the polypeptide not being required for the growth of the transformant; the process of forming the transformant strain of yeast; and the transformant strain of yeast.

Abstract: The present invention relates to synthesis of HBsAg in yeast. Yeast expression vectors comprising a yeast promoter, ADHl, have been constructed. The region of the HBV genome coding for the S-protein, excluding a possible 163 amino acid presequence, has been transferred to the yeast expression vector.Using the described yeast vector, the successful synthesis of HBsAg by yeast has been achieved. The product is antigenic (reactive with anti-HBsAg), and a substantial portion is found associated with particles identical in electron microscopic appearance to those found in the serum of HBV-infected patients and in Alexander cells but having a smaller particle size diameter. The HBsAg synthesized by yeast has identical sedimentation behavior to purified, naturally-occurring HBsAg particles purified from Alexander cells as measured by sucrose gradient sedimentation.