Abstract:

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.

Key words: int ensifying bushing, life increment, damage deformation