A void growth and a cyclic model in ductile material using mechanism-based strain gradient crystal plasticity theory

Chuntao Luo, Jun Wei, Aditi Chattopadhyay, Hanqing Jiang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This paper addresses the problem of theoretically predicting the evolution of void for a single crystal in ductile material accounting to the size and orientation effects. In this paper, a new damage model is derived based on the theory of mechanism-based strain gradient crystal plasticity (MSG-CP). By imposing the Taylor dislocation model into a widely used Gurson model (1), we extend the Gurson model to account for the void size effect. Meanwhile, we consider the crystal orientation effect by using MSG-CP to describe the behavior of matrix. Numerical simulation has been conducted under axisymmetric loading condition for cylindrical void and under spherical symmetric tension for spherical void . It reveals that the damage of a ductile porous material has strong orientationdependence and size-dependence on microscale level. The traditional conclusion that the larger the void size is the faster it grows is also verified by the new model. Additionally, we add a kinematic hardening law to the MSG-CP theory, and have analyzed a hysteresic response of a single crystal under cyclic loading.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007
Pages29-37
Number of pages9
DOIs
StatePublished - May 30 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume12

Other

OtherASME International Mechanical Engineering Congress and Exposition, IMECE 2007
CountryUnited States
CitySeattle, WA
Period11/11/0711/15/07

Keywords

  • Crystal orientation effect
  • Gurson model
  • MSG-CP theory
  • Taylor dislocation model
  • Void size effect
  • Yield condition

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

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  • Cite this

    Luo, C., Wei, J., Chattopadhyay, A., & Jiang, H. (2008). A void growth and a cyclic model in ductile material using mechanism-based strain gradient crystal plasticity theory. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007 (pp. 29-37). (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 12). https://doi.org/10.1115/IMECE2007-42612