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negative elasticity modulus

negative elasticity modulus

negative elasticity modulus

(OP)
?
How I can use a stress-strain curve in the plastic region with the negative elasticity modulus to material’s modelling

RE: negative elasticity modulus

There is no constitutive basis for a negative modulus.  Materials do not behave this way, neither in reality nor in proper modeling.
Further, the use of such a construct (even when allowed by codes) almost guarantees severe convergence problems.  It completely freaks out the yield surface when solving Mises plasticity problems.

I would discourage this approach.

Brad

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