Virtual structural validation — finding failure modes in software before committing metal or plastic to the design.
FEA is a tool for building confidence in a design before you build the part. It doesn't replace testing — but it eliminates the obvious failure modes early, focuses physical testing on edge cases, and gives you a defensible engineering rationale for your geometry choices.
The most common analysis type in my work: apply loads, fix supports, solve for stress and deflection. I use this to check that structures won't yield or deform excessively under design loads, and to identify stress concentrations that warrant geometry changes or material upgrades. Material assignment, mesh refinement, and interpreting von Mises stress results are core workflow steps.
Modal analysis finds natural frequencies and mode shapes — critical when a device will be subject to vibration or dynamic loading. Used in the Neurosafe capstone to validate that the device's structural resonances wouldn't interfere with its function under expected use conditions.
Good FEA starts with simplification: removing cosmetic features, suppressing fillets where they don't affect results, and applying symmetry where valid. Mesh quality matters — I use mesh controls to refine elements around stress concentrations and verify convergence by comparing results across mesh densities before trusting numbers.
"The mesh is only as good as the boundary conditions. Getting the load application and fixity correct is where most FEA errors live — not in the solver."