Estimation of transient creep crack-tip stress fields for SE(B) specimen under elastic-plastic-creep conditions

Han Sang Lee, Jin Ho Je, Dong Jun Kim, Yun Jae Kim

Research output: Contribution to journalArticle

Abstract

This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.

Original languageEnglish
Pages (from-to)1001-1010
Number of pages10
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume39
Issue number10
DOIs
Publication statusPublished - 2015 Oct 1
Externally publishedYes

Keywords

  • Crack-Tip Stress Fields
  • Elastic-Plastic-Creep
  • FE Analysis
  • SEB Specimen
  • Transient Creep

ASJC Scopus subject areas

  • Mechanical Engineering

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