Evaluation of FSW Fatigue Crack Growth Rate Based on Crack Closure Phenomenon
The purpose of thisstudy is to evaluate the crack closure phenomenon of 2024-T3 aluminum alloy panel and the FSW panel joined by the alloy. Focus attention on crack opening stress, its calculation using elasto-plastic FEM is conducted to clarify the influence of residual stress on crack opening behavior. The calculated crack opening stress of base material and the FSW panel are in close agreement with the measured results. And the FEM results show that the part of crack faces around FSW weld line is opened by tensile residual stress despite no external load. This behavior conforms qualitatively to that of test result The da/dN—?Keff curves for FSW panel are obtained using the crack growth test results of base material and the calculated crack opening stress for base material and the FSW paneL The obtained curve conformed to the experimental result, indicating the crack growth rate of FSW panel could be predicted quantitatively by evaluating crack opening stress in elasto-plastic FEM
Fatigue Crack Propagation Property 2024-T3 Aluminum Alloy Friction Stir Welding FEM
Shinya Fujita Takao Okada
Major in Applied Mechanics, Graduate School of Fundamental Science and Engineering,Waseda University Aviation Program Group, Japan Aerospace Exploration Agency, Tokyo, Japan
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
756-759
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）