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Modeling of large deformation frictional contact in powder compaction processes

Khoei, A. R ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apm.2007.02.017
  3. Publisher: 2008
  4. Abstract:
  5. In this paper, the computational aspects of large deformation frictional contact are presented in powder forming processes. The influence of powder-tool friction on the mechanical properties of the final product is investigated in pressing metal powders. A general formulation of continuum model is developed for frictional contact and the computational algorithm is presented for analyzing the phenomena. It is particularly concerned with the numerical modeling of frictional contact between a rigid tool and a deformable material. The finite element approach adopted is characterized by the use of penalty approach in which a plasticity theory of friction is incorporated to simulate sliding resistance at the powder-tool interface. The constitutive relations for friction are derived from a Coulomb friction law. The frictional contact formulation is performed within the framework of large FE deformation in order to predict the non-uniform relative density distribution during large deformation of powder die pressing. A double-surface cap plasticity model is employed together with the nonlinear contact friction behavior in numerical simulation of powder material. Finally, the numerical schemes are examined for efficiency and accuracy in modeling of several powder compaction processes. © 2007 Elsevier Inc. All rights reserved
  6. Keywords:
  7. Deformation ; Finite element method ; Coulomb friction law ; Frictional contact ; Relative density distribution ; Sliding resistance ; Compaction ; Friction ; Mathematical models ; Plasticity ; Powder metals
  8. Source: Applied Mathematical Modelling ; Volume 32, Issue 5 , 2008 , Pages 775-801 ; 0307904X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0307904X07000534