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建立了分析复合材料多钉连接结构的三维有限元模型,针对多钉连接计算过程中接触状态非线性和累积损伤过程非线性造成的计算成本大和难收敛的问题,本文提出利用显式算法对多钉连接件的拉伸过程进行求解,分析多钉连接件在拉力载荷作用下的损伤演化过程,实现了对复合材料层合板机械连接结构整个承载过程的数值仿真模拟,同时进行了复合材料层合板多钉连接件的双剪拉伸试验。对比数值计算与试验结果发现,利用子程序结合显式算法计算得到的复合材料多钉连接强度值与试验相比,误差最大不超过7%。
A three-dimensional finite element model was established for the analysis of the multi-nailed composite structures of composite materials. In view of the large computational cost and difficult convergence caused by the non-linearity of the contact state and the process of cumulative damage in the process of multi-nailed connections, The process of tensioning of the splicing device is solved and the damage evolution process of the spliced multi-splicing device under the tensile load is analyzed. The numerical simulation of the whole bearing process of the mechanical connection structure of the composite material laminate is realized. At the same time, Double Shear Tension Test of Multiple Nails. Comparing with the numerical calculation and the experimental results, it is found that the error of the maximum value of multi-nail connection strength calculated by the subroutine combined with the explicit algorithm is less than 7%.