appearance of normal stresses after elastic limit during pure shear
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.