Issue 48

M. Bezzerrouki et alii, Frattura ed Integrità Strutturale, 48 (2019) 491-502; DOI: 10.3221/IGF-ESIS.48.47 491 Innovative geometric design improves the resistance of simple metal / metal lap joint Mehadjia Bezzerrouki, Kouider Madani, Abderrahmane Sahli University of Djillali Liabes, LMPM Laboratory, Sidi Bel Abbes, Algeria m_bezzerrouki@yahoo.fr , koumad10@yahoo.fr , sahliabderahmen@yahoo.fr Sébastien Touzain, Stéphanie Mallarino University of La Rochelle, LASIE Laboratory, La Rochelle, France sebastien.touzain@univ-lr.fr , stephanie.mallarino@univ-lr.fr A BSTRACT . Bonded assemblies are widely used in many industrial sectors mainly in the aerospace field. Many researches in these domains are focused on evaluating the stresses in the adhesive layer in order to achieve maximum strength and long service life. Factors that affect joint design are the mechanical and physical properties of the adhesive and the substrate. The reduction of stress concentration at the edges of the adhesive provides the strength of the adhesive layer. Our work fits in this context, based on the ASTM D1002 standard. The innovative idea of this paper is to bring geometric improvements to an assembly system type Aluminum/Aluminum 2024-T3 bonded with an adhesive ADEKIT A-140. The analysis of the stress distribution is performed by the three-dimensional finite element method using the ABAQUS calculation code. The geometric improvements presented in this work are beneficial and the results show a good reduction of the stress concentration along overlap length. K EYWORDS . Single lap joint; Adhesive; Stresses; Overlap length. Citation: Bezzerrouki, M., Madani, K., Sahli, A., Touzain, S., Mallarino, S., Innovative geometric design improves the resistance of simple metal/metal lap joint, Frattura ed Integrità Strutturale, 48 (2019) 491-503. Received: 02.01.2019 Accepted: 12.02.2019 Published: 01.04.2019 Copyright: © 2019 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION he principal aims of adhesive bond are to ensure a uniform distribution of stress along overlap length and transmit a maximum of them to minimize a stress concentration which causes damage [1]. Structural adhesive are strong, with a specifics characterizations which respond for the needs of different fields. The study of the influence of shear and peel stresses are very interesting in the fracture mechanics. The ASTM is an international standards organization that prepares and produces technical standards for materials, systems and products, it’s developed for testing and T