I have a simple pull stress analysis and the constraints keep failing. I only have a roller on the face, hinge at rear and pulling the front of this simple spring. See attached.
At face value I would have guessed this model would be stable once it hinged into the correct position. However, sometimes the solver is not great at finding the lowest energy state of these rigid body motions. I added a construction line between your two end holes then had the force apply directly along that so your design would start in the lowest energy position for rigid body motion and start stretching immediately. It gave better results but still was reporting as unstable so I went under the study 'Properties' and enabled "Use soft springs to stabilize model"; this made the setup fully stable.
Thanks Ryan, I really appreciate your help.
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