Method and apparatus for predicting the failure of a component
DCFirst Claim
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1. A method comprising;
- obtaining a Finite Element Model (FEM) of a component;
analyzing said FEM to obtain stresses at nodes of said FEM;
determining a Representative Volume Element (RVE) for at least one of said nodes;
building a microstructure-based failure model for at least one said RVE and including the microstructure-based failure model in the RVE;
simulating a component life using at least one RVE microstructure-based failure model, said simulating producing a result related to said component life;
performing said simulating a plurality of times to produce results related to component life; and
using the results to provide a prediction of failure for the component.
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Abstract
The invention provides a method and apparatus for predicting the failure of a component using a probabilistic model of a material'"'"'s microstructural-based response to fatigue. The method predicts the component failure by a computer simulation of multiple incarnations of real material behavior, or virtual prototyping. The virtual prototyping simulates the effects of characteristics that include grain size, grain orientation, micro-applied stress and micro-yield strength that are difficult to simulate with real specimens. The invention provides an apparatus for predicting the response of a component to fatigue using the method.
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Citations
31 Claims
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1. A method comprising;
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obtaining a Finite Element Model (FEM) of a component; analyzing said FEM to obtain stresses at nodes of said FEM; determining a Representative Volume Element (RVE) for at least one of said nodes; building a microstructure-based failure model for at least one said RVE and including the microstructure-based failure model in the RVE; simulating a component life using at least one RVE microstructure-based failure model, said simulating producing a result related to said component life; performing said simulating a plurality of times to produce results related to component life; and using the results to provide a prediction of failure for the component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 31)
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19. An article comprising a machine-readable medium storing instructions operable to cause one or more machines to perform operations comprising:
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receive information indicative of a component configuration of a component; obtain a finite element model (FEM) information associated with the component; analyze the FEM to obtain stresses at one or more nodes of the FEM; determine at least one Representative Volume Element (RVE) for one or more associated nodes; and simulate a first component life using at least one microstructure-based failure model included in the at least one RVE based on a first selected microstructure of a plurality of available microstructures for the component to obtain a first output; simulate a second component life for the at least one RVE based on a second different selected microstructure of the plurality of available microstructures for the component to obtain a second output; and using the first output and second output to provide a prediction of failure for the component. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A system, comprising:
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a processor; an input device configured to receive input; and one or more machine-readable media storing instructions operable to cause one or more machines to perform operations comprising; receive information indicative of a component configuration of a component; obtain a finite element model (FEM) information associated with the component; analyze the FEM to obtain stresses at one or more nodes of the FEM; determine at least one Representative Volume Element (RVE) for one or more associated nodes; and simulate a first component life using at least one microstructure-based failure model included in the at least one RVE based on a first selected microstructure of a plurality of available microstructures for the component to obtain a first output; simulate a second component life for the at least one RVE based on a second different selected microstructure of the plurality of available microstructures for the component to obtain a second output; and using the first output and second output to provide a prediction of failure for the component. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification