ABSTRACT

In this paper, the results of a parametric study conducted on the local joint flexibility (LJF) of three-planar tubular T-joints are presented and discussed. A set of finite element (FE) analyses were carried out on 81 FE models subjected to two types of axial loading in order to study the effects of geometrical characteristics of three-planar T-joint on the LJF factor (f_LJF). Generated FE models were verified against available experimental data and parametric equations. The f_LJF values in three-planar and uniplanar T-joints were compared. Results showed that the multi-planarity effect on the LJF is considerable and consequently the application of the equations already available for uniplanar T-joints to calculate the f_LJF in three-planar T-joints may result in highly over- or under-predicting results. To tackle this problem, FE results were used to develop a new parametric formula for the prediction of the f_LJF in axially loaded three-planar T-joints.

摘要

本文介绍并讨论了对三平面管状 T 形接头的局部接头柔度 (LJF) 进行的参数化研究的结果。为了研究三平面 T 形接头的几何特性对 LJF 因子 ( f _LJF )的影响，对 81 个承受两种轴向载荷的有限元模型进行了一组有限元 (FE) 分析。根据可用的实验数据和参数方程验证生成的有限元模型。比较了三平面和单平面 T 形接头中的f _LJF值。结果表明，多平面性对 LJF 的影响是相当大的，因此应用已经可用于单平面 T 形接头的方程来计算f _LJF在三平面 T 形接头中可能会导致高度高估或低估的结果。为了解决这个问题，有限元结果被用来开发一个新的参数公式，用于预测轴向加载的三平面 T 形接头中的f _{LJF 。}