Effect of residual stress on fatigue crack propagation
Book
·
OSTI ID:122597
- Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)
A mathematical model for fatigue crack propagation under the influence of residual stress has been developed which is remarkably applicable to the prediction of any kind of fatigue behaviors under residual stress fields. Since the model describes the interaction of microstructure, mechanism, and mechanics, fatigue crack propagation can be predicted in terms of readily available mechanical or physical properties of the structural material. It is also shown that an excellent correlation can be found between the present model based on the energy balance concept and experimental data, provided that residual stress distribution, process zone size, and tearing modulus are given. The present model shows that increase in compressive residual stresses ahead of crack tip can profoundly reduces catastrophic failure of the important machine and structural parts of reactor components.
- OSTI ID:
- 122597
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1335-5
- Country of Publication:
- United States
- Language:
- English
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