Transactions of Materials and Heat Treatment

Title：Study on 3 D finite deformation elasto plastic FEM

Authors： Tinghua University Wang Jiwu Hu Zhong Liu Zhuang

Unit：

KeyWords： Nonlinear of constitutive part Nonlinear of geometric part Stress stiffness Elasto plastic FEM 3 D remeshing ANSYS

ClassificationCode：O242.21,O344.7

year,vol(issue):pagenumber：1998,23(3):0-0

Abstract：

Due to the nonlinear of geometric part and constitutive part,it will generally result worse convergence characteristic for finite deformation elasto plastic FEM.Based on the ANSYS software,the 3 D finite deformation elasto plastic FEM without stress stiffness is developed by summarized and tested the finite deformation elasto plastic theory.The comparison was given with the simulation results of upsetting respectively with the developed program and the ANSYS program with stress stiffness.At last,based on this program and 3 D remeshing system,the back extrusion was simulated,and the possibility of the developed program and the reliability of the applied theory were verified.

Funds：

Reference：

1ThomasJRHughes．TheoreticalFoundationforLarge－ScaleComputationsforNonlinearMaterialBehavior．MartinusNijhofPublishers，Dordrecht，TheNetherlands1984．2WeberGG，etal．AnObjectiveTime－IntegrationPro－cedureforIsotropicRate－IndependentandRate－DependantE－lastic－PlacticConstitutiveEquations．InternationalJournalofPlasticity．1990（6）∶701～7493陈如新，胡忠民．塑性有限元法及其在金属成形中的应用．重庆：重庆大学出版社，1989

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