I have modeled a cantilever beam with material properties of Nitinol, in Abaqus CAE.(VUMAT)
There is a displacement control and pushes the end of the beam downward.
In the first step the BC is exerted and then in the second one, it is released.
The simulation works well by any material. But it exhibits a strange response when nitinol is used.(It seems that the elements are decomposed)
Any idea is appreciated.