Improvement of fatigue crack growth simulation based on the strip yield model considering the strain hardening effect of materials

Koji Gotoh, Keisuke Harada

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

Abstract

This paper presents an improved numerical simulation procedure for fatigue crack growth based on the strip yield model with a weight function. In the previous numerical model, one-dimensional bar elements plugged up the chink corresponding to the virtual crack opening displacement in the plastic zone to describe the crack wake over fatigue crack surfaces. However, this numerical simulation method gives poor growth estimations under large variable loading histories, e.g. spike overloading. It is possible that insufficient consideration of the strain hardening effect of materials leads to excess crack closure. The authors develop the numerical simulation model of fatigue crack growth by considering the strain hardening effect of materials using the modified strip yield model. Numerical simulations of fatigue crack growth under many types of loading are performed to investigate the validity of our new proposed model. Comparison of proposed simulation results with previous results and with experimental measurements confirms the superiority of the proposed method.

Original languageEnglish
Title of host publicationASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
Pages187-194
Number of pages8
DOIs
Publication statusPublished - Dec 1 2012
EventASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 - Rio de Janeiro, Brazil
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume6

Other

OtherASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
CountryBrazil
CityRio de Janeiro
Period7/1/127/6/12

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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  • Cite this

    Gotoh, K., & Harada, K. (2012). Improvement of fatigue crack growth simulation based on the strip yield model considering the strain hardening effect of materials. In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 (pp. 187-194). (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 6). https://doi.org/10.1115/OMAE2012-83664