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Given a very large and oscillating Stainless Steel tray, calculate fatigue loads and other structural stresses.

3D CAD model setup with Von Mises material model with isotropic hardening capability, among other things.

Time-based, cyclic, nodal strains, stresses, and displacements.

This problem was unique in that it had to incorporate the non-linear material model, large deflections, load stiffening, gravity and inertial loading, and pressures. The first animation above (click on thumbnail graphics) shows the tray as driven by the off-set crank, which drives the tray at 100 rpm. Notice the pivot arms. The last animation shows the resulting Maximum Principal stresses, which are used to determine fatigue susceptibility.