ELASTOPLASTIC ANALYSIS OF PERFORATED METAL SHEETS USING TRANSFORMATION FIELD ANALYSIS AND FINITE ELEMENT METHOD

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CHRISTIANO AUGUSTO FERRÁRIO VÁRADY FILHO
MÁRCIO ANDRÉ ARAÚJO CAVALCANTE

Abstract

THIS INVESTIGATION ANALYZES THE COST-BENEFIT RATIO OF THE TRANSFORMATION FIELD ANALYSIS TO COMPUTE THE ELASTOPLASTIC BEHAVIOR OF PERIODICALLY PERFORATED METAL SHEETS. EVALUATION OF ACCURACY AND COMPUTATIONAL COST ARE ANALYZED BY IMPLEMENTING A FINITE ELEMENT APPROACH COUPLED WITH THE TRANSFORMATION FIELD ANALYSIS TECHNIQUE FOR DIFFERENT MESHES AND FINITE ELEMENT ORDERS. NUMERICAL STUDIES ARE EMPLOYED TO COMPARE TRANSFORMATION FIELD ANALYSIS ACCURACY WITH STANDARD FINITE ELEMENT ANALYSIS FOR ELASTOPLASTIC ANALYSIS OF PERIODICALLY PERFORATED METAL SHEETS. ADDITIONALLY, EXPERIMENTAL DATA IS EMPLOYED TO VALIDATE THE TRANSFORMATION FIELD ANALYSIS RESULTS. THE TRANSFORMATION FIELD ANALYSIS REQUIRES CALCULATING THE STRAIN CONCENTRATION AND INFLUENCING TENSORS EMPLOYING THE FINITE ELEMENT METHOD. THE NUMERICAL RESULTS SHOW THE TECHNIQUE'S CAPABILITIES AND FAVORABLE
SCENARIOS, BESIDES THE INFLUENCE OF DOMAIN DISCRETIZATION AND FINITE ELEMENT ORDER. 

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