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 Citation (Scopus)

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 publicationASME International Mechanical Engineering Congress and Exposition, Proceedings
Pages29-37
Number of pages9
Volume12
DOIs
StatePublished - 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Other

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

Fingerprint

Plasticity
Crystals
Single crystals
Crystal orientation
Porous materials
Hardening
Kinematics
Computer simulation

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

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 ASME International Mechanical Engineering Congress and Exposition, Proceedings (Vol. 12, pp. 29-37) https://doi.org/10.1115/IMECE2007-42612

A void growth and a cyclic model in ductile material using mechanism-based strain gradient crystal plasticity theory. / Luo, Chuntao; Wei, Jun; Chattopadhyay, Aditi; Jiang, Hanqing.

ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 12 2008. p. 29-37.

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

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 ASME International Mechanical Engineering Congress and Exposition, Proceedings. vol. 12, pp. 29-37, ASME International Mechanical Engineering Congress and Exposition, IMECE 2007, Seattle, WA, United States, 11/11/07. https://doi.org/10.1115/IMECE2007-42612
Luo C, Wei J, Chattopadhyay A, Jiang H. A void growth and a cyclic model in ductile material using mechanism-based strain gradient crystal plasticity theory. In ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 12. 2008. p. 29-37 https://doi.org/10.1115/IMECE2007-42612
Luo, Chuntao ; Wei, Jun ; Chattopadhyay, Aditi ; Jiang, Hanqing. / A void growth and a cyclic model in ductile material using mechanism-based strain gradient crystal plasticity theory. ASME International Mechanical Engineering Congress and Exposition, Proceedings. Vol. 12 2008. pp. 29-37
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