usermat

Hi every one,

I am new in ansys and I have a problem,I will be glad if you help me find the solution for it. I want to model a poly crystalline material and I have some problems in defiing material properties. For each grain the material properties is a function of grain size. So for each grain I need to calculate grain volume and use that value to calculate the plastic flow stress and true strain. I want to write a script in ansys to calculate the volume of each grain, calculate the properties and assigh a material with that property to each grain. Can any one help me ?

Hello everyone,

I hope to find an answer to my problem in this forum.

I'm working on the finite element model of a SMP in order to predict the recovery shape after heating. I'm in trouble about the material properties of this kind of polymer. I run tensile stress test, DMA and TMA in order to characterise the material. However I didn't succeed to write the good command in Ansys to get a shape memory effect.

Does anyone of you has knowledges about SMP ?

Thank you very much,

Michel

Dear all,

I'm writting an usermat into a vectorized subroutine in LS DYNA. The implementation is a non-local model based on an avarage of the strains.

For the implementation I need to know the strains for all the elements at each iteration to compute the non-local strains of all the elements.