Reliable FE-Modeling with ANSYS

ANSYS is one of the leading commercial finite element programs in the world and can be applied to a large number of applications in engineering. Finite element solutions are available for several engineering disciplines like statics, dynamics, heat flow, fluid flow, electromagnetics and also coupled field problems. It is well known that a finite element solution is always an approximate solution of the considered problem and one always has to decide whether it is a good or a bad solution. Hence, the question is how a finite element solution can be validated. In this paper we mention several aspects of modelling to obtain a good finite element solution for problems in structural mechanics. Although ANSYS gives quite a lot of warnings to prevent the user from making modelling mistakes, there are still some aspects during the preand postprocessing and also during the solution process we would like to discuss just to point out where user knowledge might still be necessary to obtain good results. In our investigations we use both ANSYS products: ANSYS and ANSYS Workbench. Several ways of modelling a problem of structural mechanics are discussed, taking into account the different available features of ANSYS and ANSYS Workbench.

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