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Modelling of powder compaction process using an endochronic plasticity model

Khoei, A. R ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. DOI: 10.1016/S0924-0136(02)00708-2
  3. Publisher: 2002
  4. Abstract:
  5. In this paper, a density-dependent endochronic plasticity is presented for modelling the isothermal deformation behaviour of metal powder at low homologous temperature. As large deformation is observed in powder compaction process, a hypoelastic-plastic formulation is developed in the context of finite deformation plasticity. Constitutive equations are stated in unrotated frame of reference that greatly simplifies endochronic constitutive relation for finite plasticity. The material parameters in the constitutive model are calibrated for a tip shape component by fitting the model to reproduce data from true triaxial compression experiments. Numerical algorithm for accurate and stable integration of constitutive equations is proposed and algorithmic modulus consistent with numerical integration of constitutive equations is extracted. © 2002 Elsevier Science B.V. All rights reserved
  6. Keywords:
  7. Endochronic theory ; Finite strains ; Hypoelastic model ; Plastic deformation ; Powder compaction
  8. Source: Journal of Materials Processing Technology ; Volume 130-131 , 2002 , Pages 175-180 ; 09240136 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0924013602007082