运用ANSYS12.0软件对不同配合精度下复合材料螺栓连接接头强度进行三维有限元分析。采用ANSYS自带的Tsai-Wu(蔡-吴)法则作为失效判断依据,计算接头的初始破坏载荷。对试件进行相关试验,通过与计算结果对比,试验结果与计算结果相吻合。结果表明:在间隙配合情况下,随着配合间隙的减小,接头初始破坏载荷逐渐增加,复合材料孔边的应力集中程度随着减小;接头在小干涉量配合情况下具有较高的破坏载荷和低的应力集中程度,在大干涉量配合情况下接头强度迅速下降。 Using ANSYS12.0 software for three-dimensional finite element analysis of the strength of the composite bolted joints with different fitting accuracy. Using the Tsai-Wu (Tsai-Wu) rule, which comes with ANSYS, as the basis for failure judgment, the initial failure load of the joint is calculated. The related test is carried out on the test piece, and the result of the test is in good agreement with the calculated result through comparison with the calculated result. The results show that under the condition of clearance fit, the initial failure load increases gradually with the decrease of the clearance, and the stress concentration decreases along the edge of the composite material. The joint has higher damage with small interference Load and low stress concentration, the joint strength decreases rapidly with the large interference.