Hi everyone,
I tested some samples of a new material (tension & compression test) in order to obtain mateiral properties (at first Young's modulus). I want to compute a Comsol simulation with this material, so I have to define its behaviour which is non lineare. In particular, for strain>0 (tension) it shows a linear behaviour, while for strain<0 its behaviour is bilinear, so we have one value for young's modulus corresponding to small strain, and another one corresponding to large strain.
I though that one possible solution to describe this could be a piecewise function through which define the Elastic Modulus of this material (E=pw1) for example, but I have some doubts.
Could you help me please?
Maria