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[FAQ]

Sharp internal corners/edges (as in welds/ manifolds) and point loads are sources of singularities/ high stresses. This means that these locations are incapable of predicting accurate results even with accurate input data and a very fine mesh. These regions represent stress concentrations with an infinitely small radius. Numerically, finite element analysis calculates stress in these corners based on the local element size, with smaller elements yielding higher stresses. As a consequence, increasing mesh refinement only serves to increase the stress without limit.