Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading
- Authors
- Lee, H. -S.; Kim, D. -J.; Kim, Y. -J.; Ainsworth, R. A.; Budden, P. J.
- Issue Date
- 4월-2018
- Publisher
- WILEY
- Keywords
- crack-tip constraint; crack-tip stress fields; elastic-plastic-creep condition; transient creep conditions
- Citation
- FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, v.41, no.4, pp.949 - 965
- Indexed
- SCIE
SCOPUS
- Journal Title
- FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
- Volume
- 41
- Number
- 4
- Start Page
- 949
- End Page
- 965
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/76285
- DOI
- 10.1111/ffe.12740
- ISSN
- 8756-758X
- Abstract
- This paper presents transient and steady-state elastic-plastic-creep crack-tip stress fields under load-controlled loading conditions for a wide range of combinations of power-law plastic and creep materials. The crack-tip stress fields are characterized in terms of 2 parameters to accommodate the crack-tip constraint effect; the C(t)- (or C*-) integral and the (Q) parameter (the Q-parameter normalized with respect to the proximity parameter to plastic collapse). For practical application, the crack-tip stress fields are re-formulated explicitly in terms of time and crack-tip stress fields for elastic-plastic and steady-state creep conditions. Comparison with detailed FE results for plane strain tension and bend specimens shows that this formulation of the crack-tip stress fields agrees well with finite element results.
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