Dynamic strength of single lap joints with similar and dissimilar adherends |
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| Affiliation: | 1. Birla Institute of Technology and Science-Pilani, Hyderabad Campus, India;2. Indian Institute of Information Technology, Design and Manufacturing, Chennai, India;1. State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, P.R. China;2. China Science Lab, General Motors, Shanghai 200120, P.R. China;3. GM Research & Development, 30500 Mound Road, Warren, MI 48090-9055, U.S.A.;4. Department of Mechanical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China;1. University POLITEHNICA of Bucharest, 060042 Bucharest, Romania;2. Rensselaer Polytechnic Institute, 12180 Troy, NY, USA;1. Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal;2. Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal;3. Department of Mechanical and Aerospace Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10124 Torino, Italy;1. School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China;2. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, 200092, China;1. INEGI, Institute of Mechanical Engineering, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal;2. School of Engineering, Polytechnic of Porto, ISEP-IPP, Rua Dr. António Bernardino de Almeida, 431, 4200-072, Porto, Portugal |
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| Abstract: | The increased use of adhesives for joining structural parts demands a thorough understanding of their load carrying capacity. The strength of the adhesive joints depends on several factors such as the joint geometry, adhesive type, adherend properties and also on the loading conditions. Particularly polymer based adhesives exhibit sensitivity to loading rate and therefore it is important to understand their behavior under impact like situations. The effect of similar versus dissimilar adherends on the dynamic strength of adhesive lap joints is addressed in this study. The dynamic strength is evaluated using the split-cylinder lap joint geometry in a split Hopkinson pressure bar setup. The commercial adhesive Araldite 2014 is used for preparing the joints. The adherend materials considered included steel and aluminum. The results of the study indicated that the dynamic strength of the lap joint is influenced by the adherend material and also by the adherent combination. Even in the case of joints with similar adherends, the strength was affected by the adherend type. The strength of steel–steel joints was higher than that for aluminum–aluminum joints. In the case of dissimilar adherends, the strength was lower than that of the case of similar adherends. The results of this study indicate that the combination of adherend material should also be accounted for while designing lap joints. |
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| Keywords: | Epoxy Metals Lap-shear Impact |
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