Size Effects on Residual Stress Profile and Kres Calculation in 2195 FSW Samples
Residual stress is the most key factor that affects the application of friction stir weld in aircraft manufacturing. The residual stress profiles were measured in different size samples for notch perpendicular and parallel to weld. Sample size has a big effect on residual stress around notch for both type welds. For notch parallel to weld, sample size didnt change the maximum residual stress so much, while for perpendicular to weld, sample size change it very much, because the maximum residual stress is along the weld direction. Approaches to calculate stress intensity factor from residual stress (Kres) were studied, then weight function were chosen to be used. Kres were compared for three size samples both type welds. Kres starts increasingly from negative to positive, try to follow the tendency of residual stress, but slower than it. For notch perpendicular to weld, Kres keeps the same in the weld zone. More analysis still are ongoing, more results will come soon.
size effect residual stress Kres friction stir weld
Wang Zhenhai Ma Yue2
Department of Applied Mathematics,School of Science, Northwestern Polytechnical University,Xian 710 School of Aeronautics, Northwestern Polytechnical University, Xian 710072, China
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
938-941
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）