Paper Title:
Research of Constitutive Relation of Metal Powder in High Velocity Compaction
  Abstract

Metal powders behave high strain rate, viscous effect and first hardening then softening deformation characteristics during the forming process of high velocity compaction. The characteristics of high strain rate and viscous effect are described by composite nonlinear viscoelastic body which consists of non-linear spring, linear spring and high strain rate Maxwell element. The deformation characteristics of first hardening then softening can be described by changing the degree of the term of nonlinear spring from greater than 1 to less than 1. Constitutive relation of metal powder in high velocity compaction is established. The degree of the term of nonlinear spring is considered as a function of strain. The function is approximated by linear, quadratic and cubic polynomial and the stress-strain curves are analyzed respectively. Analysis results indicate that the constitutive equation can describe the deformation characteristics of metal powder in high velocity compaction.

  Info
Periodical
Advanced Materials Research (Volumes 97-101)
Edited by
Zhengyi Jiang and Chunliang Zhang
Pages
1154-1160
DOI
10.4028/www.scientific.net/AMR.97-101.1154
Citation
Z. S. Zheng, Y. P. Zhu, Q. W. Xu, X. H. Qu, "Research of Constitutive Relation of Metal Powder in High Velocity Compaction", Advanced Materials Research, Vols. 97-101, pp. 1154-1160, 2010
Online since
March 2010
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Price
$32.00
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