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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › Ignore bulk and shear modulus in UMAT LS_DYNA input parameter? › Reply To: Ignore bulk and shear modulus in UMAT LS_DYNA input parameter?

July 3, 2023 at 1:09 pm
Tuan Nguyen
Subscriber

Hi Andreas Koutras,

Thanks for your answer, since I am trying assign different Young's modulus on each element, so is there anyway to modify to assgin bulk and shear modulus on each element on UMAT.

I have assigned the young's modulus on each element like the image below.

Before, I have run the simulation of the model with ABAQUS UMAT and it give me quite good results. With LS-DYNA I cannot do that and I guess because of the affect of bulk and shear modulus so it is impossible to assign different Young's modulus on each element in LS-DYNA. My question: Is there anyway we also can assign bulk and shear modulus on each element (not on each part). If anyone use to face with the problem before please help me.

another example case:

 

von Mises stress