title: What's the smallest possible size for finite elements in FEA (structural) analyses?
body: <p>As the mesh is refined, the computed solution will approach the true solution. Leaving aside the computational cost associated with a large number of elements, is there any numerical issue related to the solution of a general structural problem (linear or nonlinear, static or dynamic) when the mesh is refined beyond any reasonable amount? In other words, is there any lower limit for the size of the element for a given structural problem? This question would extend to electromagnetic simulations as well. Thanks</p>