DD3IMP, 3D FULLY IMPLICIT FINITE ELEMENT SOLVER: IMPLEMENTATION OF CB2001 YIELD CRITERION
Journal Title: ROMANIAN JOURNAL OF TECHNICAL SCIENCES - APPLIED MECHANICS - Year 2015, Vol 60, Issue 1
Abstract
The strategies and algorithms adopted in the fully implicit FE solver DD3IMP to model the orthotropic behavior of metallic sheets, as well the procedure for parameters’ identification, are the main focus of this work; a special and detailed emphasis will be given to the numerical implementation of the Cazacu and Barlat (2001) yield criterion. The usage and application of the aforesaid solver and yield criterion will be exemplified with the deep drawing of a cylindrical cup, an example typically adopted to study the effect of the material’s orthotropy in forming operations. Two materials with distinct anisotropic behaviors are considered, namely: the AA5042 aluminum alloy and the AKDQ steel. The material parameters are identified from experimental data taking into account both flow stresses and r-values. The analysis of the results indicates that a good description of the anisotropy of both flow stresses and r-values are important to the overall accuracy of the predicted earing profile. However, either the global process history or the process parameters may influence the earing prediction, particularly the contact interactions with the flange during the forming process.
Authors and Affiliations
P. D. BARROS, D. M. NETO, J. L. ALVES, M. C. OLIVEIRA, L. F. MENEZES
Keywords
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