Paper number 143

A STRENGTH ANALYSIS METHOD OF COMPOSITE PLATE WITH MULTIPLE BOLTED JOINTS

Yang Xu¹ , Zhang Yining¹ , Xu Xiwu²

1Shenyang Aircraft Research Institute, Shenyang, 110035, P. R. China)
2Department of Aircraft Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, P. R. China

Summary

In this paper, a very useful method for design calculations is proposed to analyze the strength of composite plates with multiple bolted joints. The method first transforms the problem into a complex potential value problem in anisotropic plane elasticity and then utilizes the Faber series expansion and the least squares boundary collocation techniques to obtain the series solutions of the stress concentration around holes in a finite composite laminated plate. Yamada-Sun point stress criterion and the characteristic length are used to predict the hole strength, so the calculations of the contact stress and the effect of material non-linearity, large displacement and stiffness reduction on the strength, which are complicated and yet very difficult to be simulated numerically, are not required. The method is then used to study the effect of the ply ratio and distance between bolts on the pin load distribution and bearing strength after the it is tested.

Keywords

laminate, pin load distribution, joint strength, joint parameter.