Learning Forum

[Wasif]

Hi

In the figure below you will see that the normal stresses T and L start to appear once the elastic limit has been reached. by shear stress T-L. Is it because the way ANSYS calculates the stress (which is Cauchy stress) and that calculates the stresses based on deformed geometry?

Because I am using ls-dyna and when I use elform=0, these normal stresses do not appear in the results. (elform=0 calculates results based on reference geometry).

Also I have checked various boundary conditions myself so there is nothing wrong there.

[Chris Quan]

Since you are modelling the pure shear problem that has large (plasticity) shear deformation, ELFORM = 0 is the best choice of the element type, according to LS-DYNA K manual.nn n