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Quantitative analysis on low cycle fatigue damage: a microstructural model for the prediction of fatigue life

Title
Quantitative analysis on low cycle fatigue damage: a microstructural model for the prediction of fatigue life
Author
신동혁
Keywords
Crack distribution; Equivalent crack; Grain size; LCF life prediction; Multi-cracking
Issue Date
2004-08
Publisher
ELSEVIER SCIENCE SA
Citation
Materials Science and Engineering A, v. 379, No. 1-2, Page. 210-217
Abstract
A study has been made to develop a model predicting the low cycle fatigue life of a material in relation to its microstructural variables. To achieve this goal, the concept of damage accumulation by multiple surface cracks has been adopted. An equation for stage I crack growth suggested by Tomkins was modified to consider the effect of grain size on the crack growth rate at early stage, and statistical analysis was carried out to calculate the final crack length for fatal failure. A concept of equivalent crack length has been used to present the quantitative description of crack growth rate when multiple cracks grow at the same time. To verify the suggested model, low cycle fatigue tests were conducted for the polycrystalline single-phase steel with the various grain sizes. The results showed a good agreement between the experimental data and the predicted curve.
URI
https://information.hanyang.ac.kr/#/eds/detail?an=edselc.2-52.0-3242709766&dbId=edselchttps://repository.hanyang.ac.kr/handle/20.500.11754/151673
ISSN
0921-5093
DOI
10.1016/j.msea.2004.01.044
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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