基于<strong>8.8</strong>级螺栓疲劳性能的预紧力优化

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7. 对应于螺栓服役10⁷周的预紧应力( $σ 0107$ )与强度极限(σ_b)之比和预紧扭矩与应力比(R)的关系曲线

Fig.7. Relationships between $σ 0107$ /σ_b-R and pretightening torque-R