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http://dx.doi.org/10.3795/KSME-A.2003.27.1.175

Fatigue Life Estimation of Welded Components Considering Welding Residual Stress Relaxation and Its Mean Stress Effect  

Han, Seung-Ho (한국기계연구원 구조연구부)
Han, Jeong-Woo (한국기계연구원 구조연구부)
Shin, Byung-Chun (한국기계연구원 구조연구부)
Kim, Jae-Hoon (충남대학교 기계설계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.1, 2003 , pp. 175-182 More about this Journal
Abstract
The fatigue life of welded joints is sensitive to welding residual stress and complexity of their geometric shapes. To predict the fatigue life more reasonably. the effects of welding residual stress and its relaxation on their fatigue strengths should be considered quantitatively, which are often regarded to be equivalent to the effects of mean stresses by external loads. The hot-spot stress concept should be also adopted which can reduce the dependence of fatigue strengths for various welding details. Considering the factors mentioned above, a fatigue life prediction model using the modified Goodman's diagram was proposed. In this model, an equivalent stress was introduced which is composed of the mean stress based on the hot-spot stress concept and the relaxed welding residual stress. From the verification of the proposed model to real welding details, it is proved that this model can be applied to predict reasonably their fatigue lives.
Keywords
Fatigue Life; Welding Residual Stress; Stress Relaxation; Hot-Spot Stress; Equivalent Stress;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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