复合材料结构干涉连接

发布时间：2018-02-14 21:20

本文关键词： 复合材料干涉连接应力集中　出处：《南昌大学》2011年硕士论文　论文类型：学位论文

【摘要】：复合材料连接部位较大的应力集中使它成为复合材料结构的重要强度薄弱环节。干涉连接是复合材料接头中非常重要的连接形式。本文重点研究了复合材料干涉连接技术。研究材料为连续碳纤维增强树脂基复合材料：碳／环氧树脂T300/QY8911,以下简称复合材料。首先,本文对复合材料力学性能进行了全面细致的介绍,概括了该领域的国内外研究现状,并在此基础上引出本文的研究宗旨,从数值模拟方面对其做进一步辅助分析。其次,利用Ansys10.0软件对平板复合材料接头在单孔铆钉连接拉伸状态下的力学性能进行了有限元分析,在分析过程中采用静态接触算法模拟铆钉与复合材料板的干涉配合过程。通过对Ansys数值模拟发现复合材料相同角度铺层的应力状况有一定的相似性。对间隙配合下和干涉配合下结构连接处的应力状况进行比较发现：复合材料层合板合适的干涉配合连接下,应力集中得到缓解,结构连接处的强度得到提高。再次,利用Ansys10.0软件对平板复合材料接头在单孔铆钉连接下采用不同干涉量、模量比和摩擦系数时的力学性能进行了有限元分析比较。研究结果表明：当采用合适的干涉量、模量比和摩擦系数时,结构连接处强度得到很好的优化。最后,本文对研究内容作了总结,针对论文中暂未解决的问题对后续工作作了展望。
[Abstract]:The large stress concentration in the joint of composite material makes it an important weak link in the structure of composite material. Interference connection is a very important joint form in the joint of composite material. In this paper, the interference of composite material is mainly studied. Bonding technology. Continuous carbon fiber reinforced resin matrix composites: carbon / epoxy resin T 300 / QY 8911, hereinafter referred to as composites. Firstly, the mechanical properties of composite materials are introduced in detail, and the current research situation in this field is summarized. Based on this, the purpose of this paper is introduced, and further analysis is made from the aspect of numerical simulation. Secondly, the finite element analysis of the mechanical properties of plate composite joint under the condition of single hole rivet joint tension is carried out by using Ansys10.0 software. The static contact algorithm is used to simulate the interaction process between rivets and composite plates in the process of analysis. Through the numerical simulation of Ansys, it is found that the stress state of the composite laminated at the same angle is similar to that of the gap fit. By comparing the stress condition of the joint between the bottom and the interference fit, it is found that the composite laminated plate is suitable for the interference fit. The stress concentration is alleviated and the strength of the structure joint is improved. Thirdly, the finite element analysis and comparison of the mechanical properties of plate composite joints with different interference, modulus ratio and friction coefficient under single hole rivet connection are carried out by using Ansys10.0 software. In the case of modulus ratio and friction coefficient, the strength of the joint is well optimized. Finally, the research content is summarized, and the future work is prospected in view of the unsolved problems in this paper.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH131.1

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