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过盈配合能改善复合材料连接结构载荷分配的不均匀程度,对过盈配合进行分析研究能为过盈配合在复合材料多钉连接中的设计应用提供工程参考价值。对一列三钉复合材料连接结构进行二维分析,通过改变接触关系来模拟过盈配合,并利用ABAQUS软件中的USDFLD子程序对结构进行损伤分析,从损伤机理出发,揭示过盈配合结构的损伤形态形成原理,研究过盈配合在结构损伤过程中对螺栓载荷分配的影响变化规律,及其对连接结构初始破坏强度和极限强度的影响。研究结果表明:适当的过盈配合能够实现载荷分配的均匀化,提高结构的初始破坏强度;过盈配合对结构极限强度的影响不大。
The interference fit can improve the non-uniform load distribution of the composite connection structure. The analysis of the interference fit can provide engineering reference value for the design and application of the composite multi-nailed connection with the interference fit. Two-dimensional analysis of a row of three-pin composite connection structure, through the change of contact relationship to simulate the interference fit, and the use of ABAQUS software USDFLD subroutine damage analysis of the structure, starting from the damage mechanism to reveal the damage of the interference fit structure Shape formation principle, the influence of interference fit on the bolt load distribution during structural damage and the effect on the initial failure strength and ultimate strength of the connection structure were studied. The results show that proper interference fit can achieve uniform load distribution and improve the initial failure strength of the structure. The interference fit has little effect on the ultimate strength of the structure.