The displacement controlled method can unload, but it can’t snap back. It finds a nonlinear path through to the stable solution. The animation video is shown below: View Previous View Next
Force Controlled Newton Rhapson method
The Force controlled method is unable to find a solution by unloading so it ‘jumps’ to the next stable condition. The video below shows an animation of the behavior: View Next
Snap Though Problem
Shallow Roof Example: This is a classic snap-through benchmark problem used on the course The characteristics are: Pin jointed on two sides Free on two sides Point load in center The classic solution uses a quarter symmetry – but it is recommended that a full model is used The initial linear response is a […]
