Investigating the performances of stepwise patched double lap joint |
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| Affiliation: | 1. Crashworthiness and Collisions Research Group, Malaysia;2. Universiti Tun Hussein Onn Malaysia, Beg Berkunci 101 Parit Raja, Batu Pahat, 86400 Johor, Malaysia;1. School of Mechanical Engineering, Northwestern Polytechnical University, Xi''an, 710072, China;2. School of Aeronautics and Astronautics, Sichuan University, Chengdu, 610065, China;3. School of Automation, Northwestern Polytechnical University, Xi''an, 710072, China;1. Independent Researcher, 25240, Erzurum, Turkey;2. Dept. of Mechanical Eng., Ataturk University, 25240, Erzurum, Turkey;3. Dept. of Mechanical Eng., Erzurum Technical University, 25050, Erzurum, Turkey;4. Dept. of Mechanical Eng., Erzincan University, 24100, Erzincan, Turkey;1. Structural Integrity & Composites Group, Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, the Netherlands;2. MaSTeR Lab, Department of Industrial Engineering, University of Bologna, via Fontanelle 40, 47121 Forl??, FC, Italy |
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| Abstract: | An adhesive-bonded double-lap composites joint with stepwise attachments was proposed and investigated experimentally and numerically in this study. For the conventional double lap joint (DLJ), the high shear stress and peel stress taking place in the adhesive layer near the patch termination significantly influenced the joint strength. In order to diminish the amount of the stresses, a new design of stepwise patch was introduced in the fabrication of the double-lap joint. Based on the finite element stress analysis (FEA), it was found that both shear stress and peel stress within the adhesive layer were reduced appreciably by the employment of the stepwise attachment. In addition, experimental results illustrated that the double lap joint with stepwise patch exhibited not only higher joint strength, but also it showed longer fatigue life than the conventional double lap joints. |
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