| 용접잔류응력장에서 피로균열의 전파에 따른 잔류응력 재분포에 대한 해석적 평가 |
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| An Evaluation of Residual Stress Redistribution in the Welding Residual Stress Field Caused by Fatigue Crack Propagation by Finite Element Method |
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Eung-Joon Park, Eung-Joon Kim |
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| Abstract |
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An investigation was performed to predict residual stress redistribution for the crack propagation initially through tensile residual stress field. The analytical method, which is based on Dugdale model by finite element analysis using elastic analysis method considering the superposition principle, was proposed to estimate the redistribution of residual stress caused by crack propagation. The various aspect of distribution of residual stress caused by crack propagation was examined based on the configuration change of specimen. The analysis results show that the aspect of redistribution of residual stress caused by crack propagation depends on the width of the specimen provided that the initial distribution of residual stress is identical. |
| Key Words:
Crack propagation, Residual stress, Redistribution, Finite element method, Plastic zone, superposition principle |
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