Analysis of Fatigue Crack Growth Performance of Adhesive-rivet Hybrid Repaired Structure

doi:10.3901/JME.2023.22.352

Abstract

Abstract: The repair of skin structure is very important for the safe use of aircraft, different repair technology often leads to the great difference of fatigue performance of repaired structure. Most of the existing literature focuses on the study of load conduction with single connection mode, and there are relatively few studies on the repair with hybrid connection mode, and the fatigue life prediction of the repaired structure is lacking. Aiming at the problem of fatigue life prediction of skin repair structures, the fatigue tests of crack plate, riveted repair, adhesive repair and adhesive-rivet repair specimens were carried out, and established the finite element model which can predict crack growth life of repair structures. Fatigue test results show that the established crack expansion life prediction model is accurate, and the error of repair structure’s fatigue life is no more than 10%.The results show that, compared with riveting and bonding, the adhesive-rivet repair can effectively improve the fatigue life and bonding reliability of the cracked plate. The established prediction model can reliably predict fatigue life of repaired structures and has reference value for engineering applications.

Key words: fatigue crack propagation, fatigue life prediction, stress intensity factor, repair parameters, finite element analysis

CLC Number:

TG498

YU Jian, GOU Baiyong, CHEN Guiyong, ZHANG Teng, MA Binlin, FAN Xianghong, CHEN Xin, WANG Yitao. Analysis of Fatigue Crack Growth Performance of Adhesive-rivet Hybrid Repaired Structure[J]. Journal of Mechanical Engineering, 2023, 59(22): 352-368.

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