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Effect of creep-fatigue loading condition on crack tip fields of grade 91 steel at crack initiation and growth
- Authors
- Jung, Hyun-Woo; Kim, Yun-Jae; Takahashi, Yukio
- Issue Date
- 9월-2021
- Publisher
- SPRINGER
- Keywords
- Creep fatigue; Crack initiation; Crack growth; Crack tip stress fields
- Citation
- INTERNATIONAL JOURNAL OF FRACTURE, v.231, no.1, pp.127 - 135
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF FRACTURE
- Volume
- 231
- Number
- 1
- Start Page
- 127
- End Page
- 135
- ISSN
- 0376-9429
- Abstract
- In this paper, the effect of creep-fatigue loading condition on crack tip deformation and stress fields of Grade 91 steel at 600 degrees C at crack initiation and growth is studied. By using finite element debond analysis method, creep-fatigue crack growth tests using C(T) specimens under various load ratios and hold times are simulated, and the effect of creep-fatigue load ratio and hold time on the crack opening profile, equivalent stress, crack-opening stress and triaxiality at crack initiation and growth is presented. It is found that the crack tip deformation and stress fields under tension-compression creep-fatigue loading are overall different from those under tension-tension creep-fatigue and pure creep loading, due to re-sharpening of the crack tip.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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