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http://dx.doi.org/10.3795/KSME-A.2014.38.10.1163

Fatigue Assessment of High Strength Steel Welded Joints Under Bending Loading  

Lee, Myeong-Woo (Dept. of Mechanical Engineering, Korea Univ.)
Kim, Yun-Jae (Dept. of Mechanical Engineering, Korea Univ.)
Park, Jun-Hyub (Dept. of Mechatronics Engineering, Tongmyong Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.10, 2014 , pp. 1163-1169 More about this Journal
Abstract
In this study, a fatigue assessment method for vehicle suspension systems having welded geometries was established under a bending loading condition. For the fatigue life estimation of the actual product's welded joints made of different steels, bending fatigue tests were performed on welded specimens with a simplified shape for obtaining the moment-fatigue-life plot. Further, geometry modeling of the simplified welded specimens was conducted. Results of finite element analysis were used to obtain the stress-fatigue-life plot. The analysis results were also used to calculate the stress concentration factors for notch-factor-based fatigue life estimation. The test results were compared with results of the general notch-factor-based fatigue life estimation for improving fatigue assessment. As a result, it was concluded that both the welded fatigue tests and the notch-factor-based fatigue life estimation are necessary for accurate fatigue assessment.
Keywords
Fatigue Bending Test; Welded Specimen; B10 Life; High Strength Steel; Stress Concentration; FEM;
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Times Cited By KSCI : 3  (Citation Analysis)
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