Paper Title:
Strain Rate Gradient Model with Couple Stress for Micro Scale Rigid-Viscosity-Plastic Deformation
  Abstract

In order to describe scale effects in rigid-viscosity-plastic deformation at micro scale, a strain rate gradient model with couple stress is proposed. In the constitutive equation, couple stress, strain rate gradient are introduced on the assumption that the potential energy depends upon the scalar invariants of the strain rate tensor and strain rate gradient tensor, at the same times, the influences of length scale of body, grain size and temperature are also considered. A FEM-based program based on this strain rate gradient model is used to simulate the process of high temperature gas pressure forming, and the value of length scale 2 l is evaluated by simulation pilot calculation. It is indicated that rigid-viscosity-plastic deformation can be more accurately simulated by the present strain gradient rate model as long as the material parameters in constitutive equation are selected suitably.

  Info
Periodical
Materials Science Forum (Volumes 551-552)
Edited by
K.F. Zhang
Pages
323-328
DOI
10.4028/www.scientific.net/MSF.551-552.323
Citation
K. Lei, K. F. Zhang, "Strain Rate Gradient Model with Couple Stress for Micro Scale Rigid-Viscosity-Plastic Deformation", Materials Science Forum, Vols. 551-552, pp. 323-328, 2007
Online since
July 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hun Kee Lee, Seong Hyun Ko, Hyun Chul Park
Abstract:A model describing nanoindentation as plastic deformation resulting from a strain gradient is investigated. Using a simplified axisymmetric...
911
Authors: Yue En Li, Jun Zhao, Cao Qing Yan, W. Wang, Shi Guo Han
Abstract:High speed milling experiments are performed for hardened H13 die steel by using coated ball end milling cutter, the residual stress of the...
183
Authors: Jing Yuan Li, Guang Tu Yang, Chun Kun Lin, Fan Wang Meng
Abstract:In the present work, a finite difference model (FDM) is built to predict the transient temperature field of the aluminum billet in the...
3161
Authors: Chang Chun Wu
Chapter 8: Hydraulic Engineering
Abstract:Through project examples, this paper set up a two-dimensional finite element seepage flow model with the help of the Auto-BANK software, to...
2699
Authors: Chang Hui Gao, Xue Song Tang, Min Wei Chen
Chapter 2: Material Processing Technology, Technologies of Application of Materials
Abstract:Aluminum alloys are often used as the aircraft fuselage materials. Three materials of aluminum alloys 2A16, 7A09 and titanium alloy TC11 are...
396