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利用有限元模拟和实验验证研究了拉伸载荷下C/SiC铆接接头的应力分布及几何参数与破坏方式的固有关系。结果表明:接头的锥度变化对接头中的应力分布影响不大,但对应力值的影响较为明显,锥度控制在2°～10°比较合适。模拟计算的铆钉临界半径为2.2016mm,小于2.2016mm时,铆钉被拉断,反之,铆钉被拔出。实验得到的临界半径为2.25mm,与计算结果的误差为2.2%,说明提出的铆接接头几何结构参数与接头破坏形式关系的模型是正确的。
The inherent relationship between stress distribution and geometrical parameters and failure modes of C / SiC riveted joints under tensile load was studied by finite element simulation and experimental verification. The results show that the taper of the joint has little effect on the stress distribution in the joint, but the influence on the stress is obvious. The taper control is suitable between 2 ° and 10 °. The calculated critical radius of the rivet is 2.2016mm, less than 2.2016mm, the rivet is pulled off, on the contrary, the rivet is pulled out. The experimental critical radius is 2.25mm, which is 2.2% less than the calculated result. It shows that the proposed model of the relationship between the geometrical parameters of the riveted joint and the failure mode of the joint is correct.