Finite Element Analysis Using Adaptive Mesh Generation

SDRC report, SDRC, 1995

MESHING
RESEARCH
CORNER

SDRC, 2000 Eastman Drive, Milford, Ohio 45150

Abstract
Researchers and vendors have discussed automating the finite element modeling and analysis process for many years. Assuring that a model has been created that adequately describes the physical phenomena present in the problem while staying within the assumptions of the method is certainly a large challenge. Interactive graphics and automated mesh generation tools, such as those found in SDRC I-DEAS. have addressed part of the problem by allowing the engineer to more quickly generate models and check for completeness and accuracy. Decisions on appropriate element type, load and restraint specification, and appropriate mesh density are still, however, left to user judgment and experience. Capabilities in each of these areas should be available in order to realize truly automated finite element analysis. SDRC has recently automated one element of the mesh generation problem through implementation of an adaptive meshing scheme within I-DEAS. This capability allows mesh density to be modified automatically based on element distortion criteria and scalar analysis results (e.g. strain energy) suggesting analysis errors. This paper provides background and addresses practical implementation issues. Examples showing typical applications are provided.