Strength analysis of seat parts under consideration of the ductile failure of metallic materials

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Strength analysis of seat parts under consideration of the ductile failure of metallic materials

Ovseenko, Alexei

In the FE-analysis of seats and seat components CRH uses material models with damage available in PAMCRASH and LS-DYNA for several years now. This way we have gained extensive experience in the application for highly loaded components. Many material models show a good correlation with the test results. The calculations with ductile failure have become for a long time a workaday practice at CRH. The material parameters are calculated depending on element edge length and element type and afterwards stored in a data base. For determination of the material curve and damage parameters, conventional tensile tests, as well as additional shear and bending tests are carried out. For all specimens the FE-models are prepared and calculated. The damage parameters are improved iteratively, until a good correlation of all calculated and measured force - displacement curves is reached. For this purpose CRH uses a standardized method which determines the suitable material parameters with the help of a nonlinear optimizer.