TENSILE PROPERTIES ANALYSIS OF CFRP-ALUMINUM BONDED-BOLTED HYBRID JOINT

Abstract

Abstract: Based on the three-dimensional progressive damage theory, the tensile strength prediction model of composite laminate-aluminum bonded joint, bolted joint and bonded-bolted hybrid double-lap joints structure were established. The numerical simulation results were in good agreement with the experimental height, which validate the feasibility of the model. On this basis, the influences of parameters such as lap width, lap length, thickness of the adhesive layer, friction coefficient of contact surface and number of bolts on the tensile properties of the bonded-bolted hybrid joint structure were investigated. The results show that with the increase of the lap width and the lap length, the failure load of the joint increases gradually and then stabilizes. The optimum lap width and lap length are 30 mm and 35 mm. The thickness of the adhesive layer has no effect on the tensile failure load of the hybrid joint structure. The greater the coefficient of friction between the bolt joint and the laminate and the bolt and the hole in the rubber-spiral hybrid joint structure, the greater the tensile failure load of the joint structure. In the case where the overlap region is the same, the double-nail hybrid joint structure has a tensile failure load that is 69% higher than that of a single nail.

Key words: bonded-bolted hybrid, bolt, lap length, failure load, composites

CLC Number:

TB332

ZHANG Chao-yu, ZHENG Yan-ping, XIONG Yong-jian, WANG Xu. TENSILE PROPERTIES ANALYSIS OF CFRP-ALUMINUM BONDED-BOLTED HYBRID JOINT[J]. Composites Science and Engineering, 2020, 0(8): 12-17.

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