Prediction model for initiation in cracked component under very low cycle fatigue

Jin Ha Hwang, Yun Jae Kim, Jin Weon Kim

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, a model is proposed to predict the initiation cycle of a cracked component under very low cycle fatigue. The prediction model is based on the simple assumption that mechanism of crack initiation in a cracked component under very low cycle fatigue loading is the same as that under monotonic loading, and is given in terms of the plastic component of monotonic J and cyclic ΔJ. For validation, predicted cycles are compared with displacement-controlled cyclic C(T) test data with two load ratios and load-controlled C(T) test data with two amplitudes. The predicted cycles based on 0.2 mm crack growth are similar in all cases.

Original languageEnglish
Article number103123
JournalTheoretical and Applied Fracture Mechanics
Volume116
DOIs
Publication statusPublished - 2021 Dec

Keywords

  • Compact tension specimen
  • Cyclic ΔJ integral
  • Initiation of crack growth
  • Monotonic fracture toughness
  • Very low cycle fatigue loading

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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