对低间隙TI-6AL-4V ELI六角头钛合金螺栓进行双剪试验,采用有限元仿真方法分析了剪切速率、刃口半径、剪切间隙等因素对螺栓性能的影响机制,以及各因素对螺栓力学性能的影响程度.结果表明:当刃口半径为0.1 mm时,仿真得到的结果与理想条件仿真结果的误差最大;剪切速率对试验结果的影响较小,当剪切速率为366.7 N/s时,螺栓剪切截面吸收的能量较高;剪切间隙对螺栓双剪试验结果的影响最大,随着剪切间隙的增加,仿真得到的结果与理想条件仿真结果之间的误差逐渐增大,说明在进行螺栓双剪试验时,应严格控制剪切间隙,避免剪切间隙对螺栓双剪试验结果产生影响;当刃口半径为0.2 mm、剪切速率为666.7 N/s、剪切间隙为0.002 5 mm时,仿真得到的结果与理想条件仿真结果之间的误差最小.
Double shear tests were conducted on low clearance TI-6AL-4V ELI hexagonal titanium alloy bolts.The finite element simulation method was used to analyze the influence mechanism of shear rate,blade radius,shear gap on bolt performance,as well as the degree of influence of each factor on bolt mechanical properties.The results show that when the blade radius was 0.1 mm,the simulation results had the largest error compared to the ideal simulation results.The influence of shear rate on the experimental results was relatively small.When the shear rate was 366.7 N/s,the energy absorbed by the bolt shear section was higher.The shear gap had the greatest impact on the results of bolt double shear test.As the shear gap increased,the error between the simulated results and the ideal simulation results gradually increased.This indicated that when conducting bolt double shear test,the shear gap should be strictly controlled to avoid its impact on the results of bolt double shear test.When the blade radius was 0.2 mm,the shear rate was 666.7 N/s and the shear gap was 0.002 5 mm,the error between the simulation results and the ideal simulation results was the smallest.
高学敏;程全士;冯德荣;冯韶伟;谢茂阳;邓艳红
河南航天精工制造有限公司, 信阳 464000||河南省紧固连接技术重点实验室, 信阳 464000天津市紧固连接技术企业重点实验室, 天津 300300北京宇航系统工程研究所, 北京 100076
TI-6AL-4V ELI钛合金;双剪试验;有限元仿真;剪切速率;刃口半径;剪切间隙
TI-6AL-4V ELI titanium alloy;double shear test;finite element simulation;shear rate;blade radius;shear gap
《理化检验-物理分册》 2024 (003)
31-37 / 7
中国科协青年托举人才工程资助项目(2017QNRC001)
10.11973/lhjy-wl202403008
评论