3D models of specimens with a scarf joint to test the adhesive and cohesive multi-axial behavior of adhesives |
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| Affiliation: | 1. Laboratoire Brestois de Mécanique et des Systèmes, ENSTA Bretagne, Brest, France;2. Institut Jean Le Rond d''Alembert, CNRS UMR 7190, Sorbonne Universités, UPMC Université Paris 06, F-75005 Paris, France;1. School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, Odisha 751024, India;2. Department of Manufacturing Engineering, National Institute of Foundry and Forge Technology (NIFFT), Hatia, Ranchi 834003, India;3. Department of Mining Machinery Engineering, Indian Institute of Technology IIT (ISM), Dhanbad, Jharkhand 826004, India;1. PIMM, UMR CNRS 8006, Arts and Métiers ParisTech, CNAM, 151 Bd de l’Hopital, 75013 Paris, France;2. LEM3, UMR CNRS 7239, Université de Lorraine, Ile du Saulcy, 57045 Metz Cedex 1, France;3. ENSCI, SPCTS, UMR CNRS 7315, 12 rue Atlantis, 87068 Limoges, France;1. Department of Aerospace Engineering, Indian Institute of Technology, Madras, Chennai, 600036, India;2. Mercedes-Benz Research and Development India, Whitefield Palms, EPIP Zone, Bangalore, 560066, India |
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| Abstract: | In this paper, accurate numerical analyses of the stress distributions within the adhesive in scarf joints under elastic assumption using 3D models are developed. An elastic limit model that takes into account the hydrostatic stress and von Mises equivalent stress, permit to define the more stressed parts of the adhesive with respect to the scarf angle. It is shown that high stress concentrations are generated near the edges and the corners of the specimen at the interface between the substrate and the adhesive. The use of ronded substrates does not lead to decrease significantly these stress concentrations. It is shown that cleaning the free edge of the adhesive changes the location of edge effects without completely erasing them. A modification of the geometry, has been proposed. This modification leads to a quasi-homogeneous distribution of the stresses in the thickness of the adhesive with stresses that tend to 0 near the edges. |
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| Keywords: | Scarf joint Bonded assembly Stress analysis Finite element analysis |
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