Simulation of strain localization in metal forming processes using bilinear mixed u/p elements

Z. H. Chen, Chak Yin Tang, T. C. Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

In this study, a large deformation finite element approach for numerical analysis of the strain localization is developed based on the concept of mixed interpolation of displacement/pressure. This finite element approach is suitable for the material constitutive relation in rate form. In order to avoid oscillatory behavior and path dependence observed in some traditional stress rates, the Truesdell stress rate is employed in the integration of the constitutive equation. The corresponding consistent tangent stiffness is derived to maintain the asymptotically quadratic convergence of the Newton-Raphson iterative scheme used in the solution of the implicit equilibrium equations. To illustrate the performance of the proposed element, the numerical simulation of three example cases has been carried out and the result shows that the element is of good capability to capture strain localization especial when remeshing operation is required.
Original languageEnglish
Pages (from-to)286-291
Number of pages6
JournalJournal of Materials Processing Technology
Volume147
Issue number3
DOIs
Publication statusPublished - 20 Apr 2004

Keywords

  • Mixed element
  • Strain localization
  • Truesdell stress rate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Modelling and Simulation
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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