Analysis of elastic interaction stiffness and its effect on bolt preloading

作者：Wang, Y. -Q.; Wu, J. -K.; Liu, H. -B.^*; Kuang, K.; Cui, X. -W; Han, L. -S

来源：International Journal of Mechanical Sciences, 2017, 130: 307-314.

DOI：10.1016/j.ijmecsci.2017.05.032

• Elastic interaction
• Analytical modeling
• Interaction stiffness
• Bolt joints

The preloading variation of bolt joint relies on the elastic interaction between tightened bolts significantly. But how to characterize the elastic interaction essentially and truly is still an intractable problem. In this article, an analytical interaction stiffness model is established through stress distribution analysis. The effect of interaction stiffness on the preload variation of tightened bolt was investigated, such as the magnitude of preload variation and the judgement of change direction of preload and the influence scope of elastic interaction was also predicted analytically and numerically. From the cliff-style interaction stiffness variation curve of typical 2-bolt joint, it was found that there was always an obvious singular point indicating no elastic interaction in a certain place between the two bolts. From comparison, the predicted results using the developed model were consistent with the FE simulations.

• 出版日期2017-9
• 单位大连理工大学