WSEAS Transactions on Applied and Theoretical Mechanics
Print ISSN: 1991-8747, E-ISSN: 2224-3429
Volume 10, 2015
Adaptive Finite Element Simulation of Sheet Forming Operations Using Continuum Elements
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Abstract: Presented in this study is the recovery techniques based adaptive finite element analysis of sheet forming operations. An adaptive finite element code AdSheet2 considering continuum elements has been developed. The code allows the analysis of sheet forming operations and gives the distribution of adaptively refined mesh, effective strain, and punch load, stress and strain rate tensor in the domain. The recovery scheme for determining more accurate velocity field is based on the least squares fitting of the computed velocities in element patches. The solution error is estimated on the basis of an energy norm. The code is used to simulate an axi-symmetric stretching of a metal blank by a hemispherical punch. The numerical results of the adaptive analysis are presented and compared with non-adaptive analysis. The results presented show that the performance of the adaptive analysis in predicting the deformation behaviour i.e. the seats of large deformations, instability and effect of contact conditions is much superior.
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Keywords: Stress Recovery, Velocity Recovery, Adaptive Mesh Refinement, Sheet Forming Operations, Finite Element Analysis, Error Estimators
Pages: 83-94
WSEAS Transactions on Applied and Theoretical Mechanics, ISSN / E-ISSN: 1991-8747 / 2224-3429, Volume 10, 2015, Art. #9