胶-螺混合连接结构强度分析及影响因素研究

为深入分析胶-螺混合连接结构强度及影响因素，利用ABAQUS平台建立胶-螺混合连接三维渐进损伤模型，采用界面层损伤判据及退化方法来模拟胶层的损伤破坏。首先，将胶-螺混合连接结构强度分别与胶接结构、螺接结构强度进行对比，详细阐释胶-螺混合连接结构与胶接结构承载机理及胶接区应力分布形式；然后，分析讨论钉头形式及宽径比对混合连接结构强度和损伤形式的影响。结果表明：胶-螺混合连接结构强度优于胶接结构和螺接结构，并得到了可有效提高结构强度的钉头形式及最佳宽径比。

Analysis of the Bonded-bolted Hybrid Composite Joints' Strength and Influences

In this paper, a three-dimensional progressive damage model of bonded-bolted joints was established with ABAQUS and by employing cohesive zone method to simulate the behavior of adhesive, a thorough analysis of the structural strength of bonded-bolted hybrid and the factors affecting it is presented. Firstly, the structural strength of bonded-bolted hybrid, bonded joints and bolted joints were analyzed comparatively and a detailed explanation was made to the carrying principle and stress distribution in bonding area of bonded-bolted hybrid and bonded joints, demonstrating that bonded-bolted hybrid is the best among the three in terms of structural strength. Then, the influence of bolt head type and width to diameter ratio to the structural strength and damage type to bonded-bolted hybrid structure was discussed, putting forward the best bolt head type and width to diameter ratio to better the structural strength.