A small time scale model for creep fatigue crack growth analysis

Zizi Lu, Jifeng Xu, Yongming Liu

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

Abstract

A novel small time scale model is proposed in this paper for the creep fatigue crack growth analysis. The proposed model is time-based formulation and does not need to transform the realistic loading history to cycles for fatigue analysis. The key idea is to formulate the instantaneous crack growth kinetics with respect to the crack tip opening displacement (CTOD). Creep deformation is included in the CTOD calculation and the effect of frequency/hold time is intrinsicaly included in the proposed formulation. Crack growth under mechanical and thermal loadings can be directly calculated by the time domain integration according to the specified mechanical and thermal loading history. Various experimental data from the open literature for metals are used to validate the proposed method and a satisfactory agreement is observed.

Original languageEnglish (US)
Title of host publicationEarth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration
PublisherAmerican Society of Civil Engineers (ASCE)
Pages610-620
Number of pages11
ISBN (Print)9780784412190
DOIs
StatePublished - Jan 1 2012
Externally publishedYes
Event13th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Earth and Space 2012 and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration - Pasadena, CA, United States
Duration: Apr 15 2012Apr 18 2012

Publication series

NameEarth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration

Other

Other13th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Earth and Space 2012 and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration
CountryUnited States
CityPasadena, CA
Period4/15/124/18/12

Keywords

  • CTOD
  • Crack growth rate
  • Creep
  • Small time scale

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Environmental Engineering
  • Building and Construction

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  • Cite this

    Lu, Z., Xu, J., & Liu, Y. (2012). A small time scale model for creep fatigue crack growth analysis. In Earth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration (pp. 610-620). (Earth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784412190.065