FEA: will it hold, and how far does it move

A study holds some faces of a part, loads others, and has CalculiX solve the linear elastic response on a netgen mesh of quadratic tetrahedra: stress and displacement under forces, pressures, the part's own weight and a steady acceleration, with an isotropic material below yield, perfectly rigid fixtures and loads that do not move. An assembly's parts are bonded where they touch. It is a first-pass engineering check, not a certification; say so when you report. Vibration, buckling, heat, flow, fatigue, impact and parts that slide on each other are not in this version: say so plainly, and do not pass a static safety factor off as an answer to them. A drop or a braking load can be estimated as a steady g-load (Body loads).

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