An equivalent crack growth model for creep fatigue life prediction of metals

Dong Pan, Fraaz Tahir, Yongming Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new creep fatigue life prediction model based on the equivalent crack growth analysis is proposed in this paper. The model is based on existing observations on the fatigue crack propagation and creep void evolution mechanisms for some metallic materials. Equivalent initial crack and void are randomly distributed in the material and their equivalent growth under creep-fatigue loadings is simulated. Pure fatigue and creep rupture testing are used to calibrate the model parameters. Arbitrary strain-based or stress-based creep-fatigue testing results are used for prediction validation. Experimental data from open literature and from in-house testing for two metals are compared with the proposed model predictions. General good agreement is observed. Some conclusions and future work are drawn based on the proposed study.

Original languageEnglish (US)
Title of host publication57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103926
StatePublished - 2016
Event57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Other

Other57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

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Keywords

  • Creep
  • Equivalent crack growth
  • Fatigue
  • Life prediction

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Architecture
  • Mechanics of Materials

Cite this

Pan, D., Tahir, F., & Liu, Y. (2016). An equivalent crack growth model for creep fatigue life prediction of metals. In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference American Institute of Aeronautics and Astronautics Inc, AIAA.