Crack growth-based fatigue-life prediction using an equivalent initial flaw model. Part II: Multiaxial loading

Zizi Lu, Yibing Xiang, Yongming Liu

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A general methodology is proposed in this paper for fatigue-life prediction using crack growth analysis. This is the part II of the paper and focuses on the fatigue-life prediction under proportional and nonproportional multiaxial loading. The proposed multiaxial fatigue-life prediction is based on a critical plane-based multiaxial fatigue damage model and the Equivalent Initial Flaw Size (EIFS) concept. An equivalent stress intensity factor under general multiaxial proportional and nonproportional loading is defined. The fatigue life is predicted by integration of the crack growth rate curve from the EIFS to the critical crack length. The proposed model can automatically adapt for different materials experiencing different local failure modes. The numerical fatigue-life prediction results calculated by the proposed approach are validated with experimental data for a wide range of metallic materials available in the literature. Reasonable agreements are observed between the model predictions and the experimental observations under proportional and nonproportional loading.

Original languageEnglish (US)
Pages (from-to)376-381
Number of pages6
JournalInternational Journal of Fatigue
Volume32
Issue number2
DOIs
StatePublished - Feb 2010
Externally publishedYes

Fingerprint

Fatigue Life Prediction
Crack Growth
Crack propagation
Non-proportional Loading
Fatigue of materials
Multiaxial Fatigue
Defects
Directly proportional
Growth Analysis
Crack Growth Rate
Fatigue Damage
Fatigue Life
Failure Mode
Stress Intensity Factor
Model
Prediction Model
Fatigue damage
Crack
Stress intensity factors
Failure modes

Keywords

  • Crack growth
  • Critical plane
  • EIFS
  • Life prediction
  • Multiaxial fatigue

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Modeling and Simulation

Cite this

Crack growth-based fatigue-life prediction using an equivalent initial flaw model. Part II : Multiaxial loading. / Lu, Zizi; Xiang, Yibing; Liu, Yongming.

In: International Journal of Fatigue, Vol. 32, No. 2, 02.2010, p. 376-381.

Research output: Contribution to journalArticle

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