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The Essentials of Finite Element Modeling and Adaptive Refinement by John O. Dow

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CHAPTER 6

INTRODUCTION TO ADAPTIVE REFINEMENT

6.1 INTRODUCTION

The initial finite element model for a problem rarely provides a solution that is accurate enough for use in the design process. The obvious strategy for improving the model is to repeatedly subdivide every element in the model until the change in two successive results is acceptably small. However, this brute force approach for reaching a converged solution leads to finite element models that are unmanageably large because elements are needlessly introduced into regions where little or no error exists.

The excessive growth produced by uniformly refining a finite element model can be eliminated by selectively improving the model only in regions containing unacceptable levels of ...

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