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解决飞机结构中接头的应力集中问题是延长飞机结构寿命的关键。采用有限元方法对多钉结构的金属连接件的载荷分配进行了研究,并对铆接接头的细节进行应力分析,给出了接头各细节处的应力分布,从而确定了各铆钉孔边危险点处的应力集中系数。同时探讨了台阶形搭接接头的几何构形对铆钉传递载荷和钉孔边危险点处应力集中系数的影响,对其部分几何构形参数进行了优化设计,得到有效降低孔边应力的构形方案。该方案对接头结构的疲劳性能分析具有一定的参考价值。
Solving the problem of stress concentration in the joints of the aircraft structure is the key to extending the life of the aircraft structure. The finite element method was used to study the load distribution of the metal connectors with multi-nail structure. The stress analysis of the details of the riveted joints was carried out. The stress distribution at each detail of the joints was given, The stress concentration factor. At the same time, the influence of the geometrical configuration of the stepped lap joint on the stress transfer coefficient at the dangerous point of the rivet transfer and the nail hole was discussed. Some geometric parameters of the stepped lap joint were optimally designed, Program. The program has certain reference value for the fatigue performance analysis of joint structure.