Characterization of elastic-plastic-creep crack-tip stress fields under load and displacement control

Dong Jun Kim, Han Sang Lee, Jin Ho Je, Yun Jae Kim, Robert A. Ainsworth, Peter J. Budden

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper characterizes the elastic-plastic-creep crack-tip stress fields under load and displacement control. The stress field has been calculated from finite element (FE) transient creep analysis under each load control condition and displacement control condition. Varying the magnitude of initial step load is considered to investigate the influence of plasticity to creep. Both same stress exponent and different stress exponent in power-law creep and plasticity were considered. In the displacement control condition, elastic-follow-up factor is estimated by comparing FE results with existing formula. This paper proposes an equation to predict crack-tip stress fields under transient creep using a modification of the existing formula and verifies the proposed equation by comparing with FE results.

Original languageEnglish
Pages (from-to)832-839
Number of pages8
JournalProcedia Structural Integrity
Volume2
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

Keywords

  • Crack-tip stress fields
  • Elastic-plastic-creep
  • Load control and displacement control condition
  • Single-edge-cracked bend specimen

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Characterization of elastic-plastic-creep crack-tip stress fields under load and displacement control'. Together they form a unique fingerprint.

  • Cite this