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How to model plasticity problem in COMSOL if I have the true stress- strain curve?
Posted 27 janv. 2022, 12:58 UTC−5 Structural & Acoustics, Materials, Structural Mechanics Version 5.6 1 Reply
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Hello,
I am modeling a nonlinear problem in which a large plastic deformation of a new alloy is to be done. As a material property of the alloy, I have the true stress-strain curve of the material and the young modulus of elasticity and Poisson ratio. How to implement the data of this true stress-strain curve in giving the material properties of plasticity problem with isotropic hardening in the COMSOL- Multiphysics 5.6?
Thank you!
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In this model https://www.comsol.com/model/elastoplastic-analysis-of-holed-plate-244 (also shipped in Application Libraries) you can find an example of how to use tabulated stress-strain data in an elastoplastic analysis.
The fact that your case is a large strain analysis will not make any difference. The expected input is true stress vs. true strain.
-------------------Henrik Sönnerlind
COMSOL