复合材料螺栓连接渐近失效分析

发布时间：2018-02-13 08:31

本文关键词： 复合材料螺栓连接渐进失效摩擦系数预紧力　出处：《玻璃钢/复合材料》2017年07期 　论文类型：期刊论文

【摘要】：为了研究预紧力和摩擦系数对复合材料螺栓连接强度的混合影响及其机理,使用ANSYS软件建立了复合材料层合板单钉连接的三维有限元模型。采用渗透接触法来模拟螺栓的预紧力,考虑各组件之间的接触摩擦和结构二次弯曲的影响,使用改进后的三维Hashin失效准则和Camanho退化模型,对复合材料单钉连接进行渐进失效分析。数值模拟结果与文献中的实验结果吻合良好。分析结果表明,增大接触面的摩擦系数和施加合适的预紧力均能提高接头强度。摩擦系数小时,通过增加预紧力来提高接头强度的效果不明显,反而使复合材料容易发生基体开裂。在施加预紧力的同时应综合考虑摩擦系数的大小。
[Abstract]:In order to study the effect of preload force and friction coefficient on the joint strength of composite bolt and its mechanism, The three-dimensional finite element model of single nail joint of composite laminated plate was established by using ANSYS software. The pre-tightening force of bolt was simulated by using the method of osmotic contact, and the effects of contact friction and secondary bending of structure were considered. Using the improved three dimensional Hashin failure criterion and the Camanho degradation model, the progressive failure analysis of the single pin joint of composite materials is carried out. The numerical simulation results agree well with the experimental results in the literature. The results show that the numerical simulation results are in good agreement with the experimental results in the literature. The strength of the joint can be improved by increasing the friction coefficient of the contact surface and applying the appropriate pretension force, but the effect of increasing the pretension force on the joint strength is not obvious when the friction coefficient is small. On the contrary, matrix cracking is easy to occur in composite materials, and the friction coefficient should be taken into account when pretightening force is applied.
【作者单位】：武汉理工大学材料复合新技术国家重点实验室;
【分类号】：TB33

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