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Volume 15
Issue 22
10.3390/ma15228013
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Communication

Parametric Investigation into the Shear Strength of Adhesively Bonded Single-Lap Joints

by
Quanlong Chen
1,2,
Bing Du
3,*,
Xiaodong Zhang
4,
Hai Zhong
4,
Conggang Ning
3,
Huimin Bai
3,
Qian Li
3,
Ruqing Pan
3,
Baocheng Zhou
2 and
Hanjie Hu
1,2,*
1
School of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, China
2
The Green Aerotechnics Research Institute of CQJTU, Chongqing 401120, China
3
Chongqing Key Laboratory of Nano–Micro Composite Materials and Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
4
Innovation Center, Chongqing Polycomp International Corp., Chongqing 401321, China
*
Authors to whom correspondence should be addressed.
Materials 2022, 15(22), 8013; https://doi.org/10.3390/ma15228013
Submission received: 13 October 2022 / Revised: 2 November 2022 / Accepted: 8 November 2022 / Published: 13 November 2022
(This article belongs to the Special Issue Advanced Manufacturing Technologies of Thermoplastic Composites)
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Abstract

In this paper, the shear strength of adhesively bonded single-lap joints were experimentally and numerically investigated. Based on the validated simulation, the effects of lap length, adhesive layer thickness, adhesive layer shape, adhesive layer overflow length, and laminate lay-up on the shear strength of adhesively bonded single-lap joints were studied. The load-displacement curves and shear strength under different parameters were compared. It was shown that the shear strength of single-lap joints gradually decreases with the increase of lap length and adhesive layer thickness, which were 53.83% and 16.15%, respectively. Considering the potential condition in fabrication, the adhesive layer shape and adhesive layer overflow length were also investigated. The adhesive with normal and triangle shape owned the comparable shear strength, which was higher than the arc one. The shear strength increased by 19.37% from 18.43 MPa to 22.00 MPa with increasing the adhesive layer overflow length to 50% of lap length. It was beneficial for shear strength to increase the adhesive layer overflow length to 50% of lap length. Among the selected four lay-ups, [0]16s had the highest shear strength, which was nearly 3 times greater than the one of [90]16s. In the real process preparation, increasing the number of 0° layers, selecting the appropriate lap length and thickness of the adhesive layer, and controlling the shape and length of the adhesive layer overflow are of great help to improve the tensile shear strength of the single-lap glue joint.
Keywords: composite laminate; single lap joint; adhesively bonding; geometric parameters; failure strength composite laminate; single lap joint; adhesively bonding; geometric parameters; failure strength

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MDPI and ACS Style

Chen, Q.; Du, B.; Zhang, X.; Zhong, H.; Ning, C.; Bai, H.; Li, Q.; Pan, R.; Zhou, B.; Hu, H. Parametric Investigation into the Shear Strength of Adhesively Bonded Single-Lap Joints. Materials 2022, 15, 8013. https://doi.org/10.3390/ma15228013

AMA Style

Chen Q, Du B, Zhang X, Zhong H, Ning C, Bai H, Li Q, Pan R, Zhou B, Hu H. Parametric Investigation into the Shear Strength of Adhesively Bonded Single-Lap Joints. Materials. 2022; 15(22):8013. https://doi.org/10.3390/ma15228013

Chicago/Turabian Style

Chen, Quanlong, Bing Du, Xiaodong Zhang, Hai Zhong, Conggang Ning, Huimin Bai, Qian Li, Ruqing Pan, Baocheng Zhou, and Hanjie Hu. 2022. "Parametric Investigation into the Shear Strength of Adhesively Bonded Single-Lap Joints" Materials 15, no. 22: 8013. https://doi.org/10.3390/ma15228013

APA Style

Chen, Q., Du, B., Zhang, X., Zhong, H., Ning, C., Bai, H., Li, Q., Pan, R., Zhou, B., & Hu, H. (2022). Parametric Investigation into the Shear Strength of Adhesively Bonded Single-Lap Joints. Materials, 15(22), 8013. https://doi.org/10.3390/ma15228013

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