Yield surface effects on stability and failure

Abstract eng:
This work looks at the effects of yield surface description on the stability and failure of metal structures. We consider a number of different yield surface descriptions, both isotropic and anisotropic, that are available for modeling material behavior. These yield descriptions can all reproduce the same nominal stress-strain response for a limited set of load paths. However, for more general load paths the models can give significantly different results that can have a large effect on stability and failure. Results are shown for the internal pressurization of a cylinder and the differences in the predictions are quantified.

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