复合材料层板衬套强化孔的疲劳寿命增益分析

 介绍了复合材料层板机械连接孔一种衬套强化工艺方法的应用性研究结果。实验分析表明，采用衬套连接技术能够有效改善和提高复合材料连接孔的原始疲劳品质及其耐久性寿命，并具有稳定的寿命增益比。通过改变衬套材料与装配方法，获得了孔的不同疲劳损伤变形对比结果。初步实现了复合材料连接强化技术的可行性尝试。

ANALYSIS OF INCREMENT FOR THE FATIGUE LIFE OF BUSHING INTENSIFIED HOLE ON COMPOSITE LAMINATE PLATE

The intensifying bushing technique was used to extend the fatigue life of the mechanical linking hole on the composite laminate plate. The damage deformation analysis for ordinary fit bolt connections hole, interference fit bolt connections hole and bushing fit connections hole under 3×10 5 designed life shows that the bushing technique can improve the original fatigue quality and durability of mechanical holes of laminate plates obviously, and the technique possesses a stable increment ratio of fatigue life. The fatigue life N 95/95  based on the two parameter Weibull distribution makes it known that the intensifying bushing joint can get a life increment by 7.3 times as against ordinary joint, and life increment by 1.5 times as against interference joint. For three typical kinds of bushing materials the specific deformation target and the analysis conclusion are given.