Modeling Snap-through behavior in the Static Structural
I have a problem modeling snap-through behavior in the static structural. I have a bi-stable structural. When I compress the structure the load increases until it reaches a maximum, then it decreases and becomes negative as shown in the below graph.
As indicated in the energy graph, I expect that if I remove the external force or the applied displacement in point R1 and R2 the structure return to its initial configuration (A). While if we remove the force in the R3 point it will settle at the second stable configuration (C). Now, in my model, if I remove the force at point R1 it return to A configuration (as expected) but if I remove the force at point R2 the structure will continue deformation and will eventually rest at C configuration.
I have tried different stabilization method; Constant, Reduced, Line search and Arc Length and the same behavior happens with all the method while if I do the same simulation in the Explicit Dynamics the response is as expected. I wonder if there is any way to correct this problem in Static Structural.
My model is attached to the discussion.