Bonding influence on static strength of single bolted joint of carbon laminates and aluminum alloy plate

doi:10.19936/j.cnki.2096-8000.20221228.006

Abstract

Abstract: The static strength tensile tests of single-bolted joint and bonded-bolted joint of carbon fiber laminate and aluminum alloy plate are carried out. A finite element model of the bonded-bolted joint is established. The three-dimensional Hashin failure criterion is embedded in the analysis model by subroutine programming. The debonding mechanism of the adhesive layer between the laminate and aluminum plate is studied, and the failure evolution process of the carbon fiber laminates is analyzed. The numerical model is revised based on test data. After the correction, the peak load error between the finite element model and the test value is 2.9%, and the error of the second peak is 14.8%. It is showed that high-strength adhesive improves the joint strength and expands safety margin of the single-bolted and bonded joint. The higher the adhesive strength, the higher the peak load. When the debonding occurs between the laminate and aluminum plate, the secondary peak load is lower than the initial one. The secondary peak load is consistent with the peak load of the non-adhesive single-bolted joint. The joint stiffness and stability of the bonded-bolted joint with adhesive in the bolt hole is better than that of the joint without adhesive in the bolt hole. The debonding mechanism of the adhesive layer between the laminate and aluminum plate under displacement loading and the failure evolution process of carbon fiber laminates are simulated well by the finite element model established in this paper.

Key words: bonding, carbon fiber, laminate, joint, strength

CLC Number:

TB332

LIU Feng, WANG Zhuo-yu, DOU Guang-zheng. Bonding influence on static strength of single bolted joint of carbon laminates and aluminum alloy plate[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(12): 46-53.

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