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Modeling of pressure-sensitive materials using a cap plasticity theory in extended finite element method

Shamloo, A ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmatprotec.2005.02.161
  3. Publisher: 2005
  4. Abstract:
  5. In this paper, a new computational technique based on the extended finite element method (X-FEM) is presented in elasto-plastic behavior of pressure-sensitive material. The cap plasticity model is employed within the X-FEM framework in numerical simulation of powder die pressing. The double-surface plasticity model includes a failure surface and an elliptical yield cap, which closes the open space between the failure surface and hydrostatic axis. The yield cap expands in the stress space according to a specified hardening rule. Application of the X-FEM in simulation of two phase plasticity continuums is presented in an incremental manner and the role of sub-elements in the partition of unity method is demonstrated. Finally, three numerical examples, including: a plate with hole subjected to compression, a double-layer foundation and the compaction simulation of metal powder are analyzed numerically. © 2005 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Boundary conditions ; Computer simulation ; Continuum mechanics ; Failure analysis ; Finite element method ; Hydrostatic pressing ; Mathematical models ; Plasticity ; Stresses ; Compaction ; Crack propagation ; Powder metals ; Cap plasticity model ; Discountinity ; Partition of unity ; Pressure-sensitive materials ; Materials science ; Surfaces ; Discontinuity ; Sub-element ; X-FEM
  8. Source: AMPT/ANMEOS Part 2 ; Volume 164-165 , 2005 , Pages 1248-1257 ; 09240136 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0924013605000749