Material characterisation and finite element modelling of cyclic plasticity behaviour for 304 stainless steel using a crystal plasticity model

Jiawa Lu, Wei Sun, Adib Becker

Research output: Journal PublicationArticlepeer-review

28 Citations (Scopus)

Abstract

Low cycle fatigue tests were carried out for a 304 stainless steel at room temperature. A series of experimental characterisations, including SEM, TEM, and XRD were conducted for the 304 stainless steel to facilitate the understanding of the mechanical responses and microstructural behaviour of the material under cyclic loading including nanostructure, crystal structure and the fractured surface. The crystal plasticity finite element method (CPFEM) is a powerful tool for studying the microstructure influence on the cyclic plasticity behaviour. This method was incorporated into the commercially available software ABAQUS by coding a UMAT user subroutine. Based on the results of fatigue tests and material characterisation, the full set of material constants for the crystal plasticity model was determined. The CPFEM framework used in this paper can be used to predict the crack initiation sites based on the local accumulated plastic deformation and local plastic dissipation energy criterion, but with limitation in predicting the crack initiation caused by precipitates.

Original languageEnglish
Pages (from-to)315-329
Number of pages15
JournalInternational Journal of Mechanical Sciences
Volume105
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Keywords

  • 304 stainless steel
  • Crystal plasticity
  • Cyclic plasticity
  • Finite element method
  • Material characterisation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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