Biaxial Simulation

Hey all !

Okay so I'm reasonable new to SolidWorks Simulation. I have cruciform specimen, image attached, with which I need to simulate under biaxial tension. It will be held at the four arms by clamp, as shown by split contacts, and then pulled also. No matter which was I perform a non linear simulation it seems to be behaving irreleastically. My main trouble is simulating being pulled on four sides as well as being restrained. When simplyfying it to holding at two and pulling at one, it deforms incorrectly which I presume is due to being incorrectly restrained.

Does anyone know a way in which I can keep it restrained and pull on four sides?

Any help is appreciated !

SolidworksSimulation