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Implementation of a constitutive model in finite element method for intense deformation

Hosseini, E ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2010.08.033
  3. Publisher: 2011
  4. Abstract:
  5. Since the constitutive information is one of the most important aspects of material deformation analysis, here a new constitutive model is proposed that can investigate the behavior of material during intense deformation better than existent models. The model that is completely based on physical mechanisms can predict all stages of flow stress evolution and also can elucidate the effects of strain and strain rate on flow stress evolution of material during intense plastic deformation. Here as an application, implementation of the constitutive model in finite element method (FEM) is used to compare two methods of sever plastic deformation (SPD) processes of copper sheet; repetitive corrugation and straightening (RCS) and constrained groove pressing (CGP). The modeling results are in good agreement with the experimental data and show that the hardness uniformity and its magnitude for RCSed sheet are higher than that for CGPed sheet. However, the prominence of these processes in strain uniformity depends on pass number
  6. Keywords:
  7. A. Non-ferrous metals and alloys ; C. Forming ; Constrained groove pressing ; Copper sheets ; Effects of strains ; Experimental data ; F. Plastic behavior ; Flow stress ; Hardness uniformity ; Intense deformation ; Material deformation ; Modeling results ; Nonferrous metals and alloys ; On flow ; Physical mechanism ; Repetitive corrugation ; Sever plastic deformation ; Aluminum sheet ; Constitutive models ; Deformation ; Metallurgy ; Plastic flow ; Plastics ; Strain rate ; Finite element method
  8. Source: Materials and Design ; Volume 32, Issue 2 , February , 2011 , Pages 487-494 ; 02641275 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S026130691000508X