Description: Demonstrating mesh convergence for a finite element analysis requires multiple meshes, but creating high quality meshes is a time-consuming task. Furthermore, estimates of the amount of error caused by mesh refinement are difficult to make for a sequence of unrelated, unstructured finite element meshes. A solution for both of these problems is to automatically generate a refined mesh by subdividing every element in the original mesh. The resulting refined mesh has a uniform 'mesh refinement ratio' (relative to the original mesh), so established mesh convergence error estimators, such as Roache's Grid Convergence Indicator (GCI), can be applied. This presentation will cover the process of automatically generating a refined mesh, and discuss the Grid Convergence Indicator (GCI) error metric. The GCI will be applied to two models subjected to transient loadings: a simple test problem and a high-fidelity model of an unclassified W76 component. The mesh convergence exhibited by the analysis code DYNA3D will be discussed.
Date: January 1, 2002
Creator: Stevens, R. Robert
Item Type: Refine your search to only Article
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