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Mesh convergence in a finite element model is demonstrated by

  • A.Using the finest mesh the computer will accept
  • B.Comparing two models with the same mesh
  • C.Reducing the applied load until the stresses are small
  • D.Refining until the answer stops changing

Answer: D

A single result from one mesh proves nothing about its accuracy. Refining and observing the quantity of interest settle is the only evidence that the discretisation error has become small, and it should be done for the quantity that matters rather than in general.

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