基于8.8级螺栓疲劳性能的预紧力优化
宋竹满1,李瑞2,钱苗2,史文博3,钱科2,马恒2,陈庆吟2,张广平1(
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Optimizing Prestress of Fatigue Property-dominated 8.8-grade Bolts
Zhuman SONG1,Rui LI2,Miao QIAN2,Wenbo SHI3,Ke QIAN2,Heng MA2,Qingyin CHEN2,Guangping ZHANG1()
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图5. 不同预紧应力下8.8级螺栓疲劳断口的扫描电镜照片
Fig.5. SEM images of fatigue damaged 8.8-grade bolt subjected to different applied prestresses (a) and (b) fatigue crack initiation zone, (c) and (d) fatigue crack growth zone;(a) and (c) σ0=84 MPa, Δσ/2=400 MPa，(b) and (d) σ0=420 MPa, Δσ/2=300 MPa
