Mechanical behaviors of bolted joint during tightening using torque control
Mechanical behaviors of bolted joint during tightening using torque control
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DOI：
10.1299/jsmea.41.185
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发表时间：
1998-04-01
期刊：
影响因子：
--
通讯作者：
Takaki, T
中科院分区：
文献类型：
--
作者：
Fukuoka, T;Takaki, T
在采用扭矩控制的螺栓连接拧紧过程中，摩擦力对螺栓轴向拉力和扭矩的影响是一个值得关注的问题。在这项研究中，螺栓连接在拧紧过程中的力学行为，如轴向拉力和扭矩的变化，进行了实验和数值研究。因此，螺纹压力侧和螺母加载表面上的摩擦系数估计通过测量施加到螺母的总扭矩，轴向张力和螺纹摩擦扭矩，并与轴向张力和扭矩的变化进行比较。通过将数值计算结果与实验结果进行比较，确定了本文提出的用于评估扭矩和轴向张力变化的有限元方法的有效性。握柄长度的大小在一定程度上影响扭矩和轴向张力的减小率。
In the tightening process of a bolted joint using torque control, the effects of friction on axial tension of bolt and torque is an issue of great interest. In this study, the mechanical behaviors of a bolted joint during tightening, such as variations of axial tension and torque, are investigated both experimentally and numerically. Hence, friction coefficients on pressure flank of screw thread and the nut loaded surface are estimated by measuring the total torque applied to nut, axial tension and thread friction torque, and compared with variations of axial tension and torque. The validity of the finite element approach proposed here for evaluating changes in torque and axial tension is ascertained by comparing the numerical results to the experimental ones. It is also shown that the size of grip length influences, to some extent, the reduction rates of torque and axial tension.