配合间隙对层板多孔连接内力分配的影响

本文利用Ｆａｂｅｒ级数展开和弹性平面理论中的复势方法，提出了一个普遍有效的关于层板多孔连接的内力分配的分析方法，作为算例应用，特别研究了配合间隙对层板四孔连接内力分配的影响。本文方法不难推广到多孔连接的其他力学问题。

Effect of Fitting Tolerance on Load Distribution of Multi-fastener Laminated Composite Joints

From a practical point of view, a mechanically fastened joint of a structure would involve multiple hole/pin connections in which there exists, in general, some positive fitting tolerances. Considering the re-distribution of loads acting on hole/pin connections due to the plastic deformation of ductile materials, the calculation of the ultimate load of a joint of metal structures would be not affected by the existence of a small positive fitting tolerance . However, for a joint in fiher/resin laminated composite structure, it will not he valid for the brittleness of the material; all of the hole/pin connections are not in contact simultaneously with each other for the existence of a positive fitting tolerance, and then the strength of the joint would be decreased.In this paper, a general and effective method is developed for load distribution of multi-fastener laminated composite joints by using Faber series expansion and complex potential method in the plane theory of elasticity. As an application, the effects of fitting tolerance on load distribution of a four-fastener joint are studied. The method presented here can be generalized to solve other problems in this field.