On the Deformation of the Bolt Head and Nut in a Bolted Joint
On the Deformation of the Bolt Head and Nut in a Bolted Joint
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螺栓连接中螺栓头和螺母的变形研究
DOI：
10.1299/jsme1958.19.203
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
K. Maruyama
中科院分区：
文献类型：
--
作者：
T. Sawa;K. Maruyama
设计螺栓连接的一个重要点是了解当载荷施加在组件上时螺栓中产生的轴向力的增量。为此，需要了解连接部件的弹簧常数 Kc 和带有螺母的螺栓的 Kt。在Kt的计算中，目前还没有考虑螺栓头和螺母的变形。本文的目的是分析 Kt 值，考虑这些变形，并合理化螺栓连接的设计。假设螺栓头是有限圆柱体，螺母是有限空心圆柱体，利用三维弹性理论对这些变形进行分析。对这些变形进行了实验，并将理论值与实验值进行了比较。他们彼此表现出相当好的一致性。考虑到这些变形，例如，计算 M24（夹紧长度 50 mm）的 Kt 值。发现该值比传统方法得到的Kt小20%。
An important point in designing a bolted joint is to know the increment of an axial force produced in a bolt, when a load is applied on an assembly. For this purpose, it is necessary to know the spring constant Kc for a connected part and Kt for the bolt with a nut. In the calculation of Kt, up to now, the deformations of bolt head and nut have not been taken into consideration. A purpose of this paper is to analyze the value of Kt, taking into account these deformation, and to rationalize the design of the bolted joint. Assuming that the bolt head is a finite cylinder and the nut is a finite hollow cylinder, these deformations are analyzed by using the three-dimensional theory of elasticity. Experiments on these deformations are carried out, and the theoretical value is compared with the experimental one. They show a fairly good agreement with each other. Taking into account these deformations, for example, the value of Kt for M24 (clamping length 50 mm) is calculated. It is found that this value is 20% smaller than that of Kt by the conventional method.