复合材料胶接接头强度设计研究

发布时间：2018-04-28 22:18

本文选题：复合材料 + 胶接　；参考：《计算机仿真》2017年03期

【摘要】：胶接是飞机复合材料结构的主要连接形式之一。由于复合材料胶接失效模式复杂,包含有复合材料层合板失效和胶层失效,强度预测的难点在于仿真各种损伤模式及其相互之间的影响。因此,提出一种集成了两种失效模型的分析方法,其中基于三维Hashin失效准则和指数型刚度退化准则的失效模型仿真复合材料层合板失效,内聚力模型仿真胶层失效。建立了能够同时模拟复合材料层合板失效和胶层失效的复合材料胶接强度分析模型。利用该模型对复合材料胶接接头强度进行了计算,计算结果与试验结果一致性较好。运用所建立的分析模型,研究了复合材料胶接接头的主要设计参数(搭接长度、贴边末端厚度过渡区阶梯比、贴片末端铺层丢层方式等)对接头强度的影响,得到了设计参数对胶接接头强度影响的规律。
[Abstract]:Adhesive bonding is one of the main joint forms of aircraft composite structures. Because the failure modes of composite laminates are complex, including the failure of composite laminates and the failure of adhesive layers, the difficulty of strength prediction lies in the simulation of various damage modes and their effects on each other. Therefore, an analysis method integrating two failure models is proposed. The failure model based on 3D Hashin failure criterion and exponential stiffness degradation criterion is used to simulate the failure of composite laminates and cohesive force model to simulate the failure of rubber layer. A composite bonding strength analysis model is established, which can simulate the failure of composite laminates and the failure of composite laminates at the same time. The model is used to calculate the strength of composite bonding joints, and the calculated results are in good agreement with the experimental results. In this paper, the influence of the main design parameters (lap length, transition zone ratio of the thickness of the edge to the end of the joint, the way of the lamination layer on the strength of the joint, etc.) is studied by using the analytical model established in this paper. The influence of design parameters on the strength of adhesive joint is obtained.
【作者单位】：中国飞机强度研究所;
【基金】：基金项目:民机科研(MIZ-2015-F-028)
【分类号】：TB33;TG49

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