Open Access

ARTICLE

Experimental and Numerical Study on Mechanical Properties of Z-pins Reinforced Composites Adhesively Bonded Single-Lap Joints

Yinhuan Yang^1,*, Manfeng Gong¹, Xiaoqun Xia¹, Linzhi Wu^2,3
1 School of Electromechanical Engineering, Lingnan Normal University, Zhanjiang, 524048, China
2 Key Laboratory of Advanced Ship Materials and Mechanics, Harbin Engineering University, Harbin, 150001, China
3 Department of Engineering Mechanics, College of Aerospace and Civil Engineering University, Harbin, 150001, China
* Corresponding Author: Yinhuan Yang. Email:
(This article belongs to this Special Issue: Mechanics of Composite Materials and Structures)

Computer Modeling in Engineering & Sciences 2022, 131(1), 365-378. https://doi.org/10.32604/cmes.2022.018535

Received 31 July 2021; Accepted 27 October 2021; Issue published 24 January 2022

Abstract

The mechanical properties of Z-pins reinforced composites adhesively bonded single-lap joints (SLJs) under un-directional tension loading are investigated by experimental and numerical methods. Three kinds of joint configurations, including SLJs with three/two rows of Z-pins and “I” array of Z-pins, are investigated by tension test. The failure modes and mechanism of reinforced joints with different Z-pins numbers and alignment are analyzed, and the comparison is performed for the failure strengths of no Z-pins and Z-pins reinforced joints. According to experimental results, failure modes of three kinds of joints are all mixed failure. It turns out that the Z-pins are pulled out ultimately. The strength of joints of more Z-pins at the end of the overlap area is relatively bigger for the joint of the same Z-pins numbers. The strength of joints with Z-pins compared with non Z-pins joints is growing at 16%. Finally, the three-dimensional distribution of interfacial stress in the lap zone of three kinds of Z-pins reinforced joints is simulated, and the numerical results are in good agreement with the experimental results. It is effective that the numerical calculation of stress analysis is verified.

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Keywords

Z-pins reinforced composite single-lap joint (SLJ); failure mode and strength; un-directional tension test; interfacial stress

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