铺层方式对CFRP-铝合金单搭接胶接接头低速冲击损伤及剩余拉伸性能的影响

doi:10.11896/cldb.21070166

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Abstract The method of forming for autoclave was used to prepare carbon fiber reinforced plastics (CFRP) laminates with [+45/-45]_4s, [0/+45/-45/90]_2s and [0/90]_4s stacking sequences, and the single-lap adhesive joints with heterogene-ous materials were obtained by bonding the laminates and aluminum alloy plates using adhesive. The contact force-time curves and tensile strength of three kinds of joints under low-velocity impact testing and tension after impact (TAI) testing were obtained by drop hammer impact testing machine and universal electronic testing machine, respectively. The impact damage mode and joint surface strain field were characterized by X-ray computed tomography (X-ray CT) technique and digital image correlation (DIC) method, respectively. The effects of stacking sequence on the impact resistance, impact damage mode and joint residual tensile properties were studied. The results show that the joint with the composite adherend whose stacking sequence is [+45/-45]_4s has high impact resistance under impact load, but the interface debonding damage of adhesive layer is more serious. The joint residual strength is more sensitive to delamination damage than the adhesive layer interface debonding. Compared with [+45/-45]_4s, the joints with the laminate as adherends whose stacking sequences are [0/+45/-45/90]_2s and [0/90]_4s, whose debonding range of the adhesive layer interface and the degradation degree of tensile strength after impact are smaller. At the same time, the tensile load of the joint after impact is mainly concentrated in the 0° ply near the adhesive layer and the failure mode is relatively complex. In addition, under the impact load, the 45° plies in the laminate have smaller deformation and higher shear resistance, which can effectively reduce the laminate impact damage and improve the joint impact resistance. The 0° plies have large deformation and high tensile strength, which can reduce the debonding damage between the adhesive layer and aluminum surface to a certain extent and improve the joint tensile failure load.

Key words： heterogeneous materials bonding stacking sequence single-lap joint low-velocity impact tensile properties failure morphology

Published: 10 June 2023 Online: 2023-06-19

CLC number:

TB332

Fund:National Natural Science Foundation of China (52071069).

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	Articles by authors
	ZOU Tianchun
	FU Ji
	JU Yuezhang
	LI Ye

Cite this article:

ZOU Tianchun,FU Ji,JU Yuezhang, et al. Effect of Stacking Sequence on Low Velocity Impact Damage and Residual Tensile Properties of CFRP-Aluminum Single-lap Adhesive Joints[J]. Materials Reports, 2023, 37(11): 21070166-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21070166 OR http://www.mater-rep.com/EN/Y2023/V37/I11/21070166

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