Issue 46

S. Mokadem et alii, Frattura ed Integrità Strutturale, 46 (2018) 113-123; DOI: 10.3221/IGF-ESIS.46.12 113 Developments in the fracture and fatigue assessment of materials and structures Effect of the angles of the cracks of corroded plate in bonded composite repair Salem Mokadem, Berrahou Mohamed, Mechab Belaïd, Belabbes Bachir Bouadjra University of Djillali Liabes, LPMM Laboratory, Sidi Bel Abbes, Algeria moka_salem@yahoo.fr , berrahou22@ yahoo.com , bmechab@yahoo.fr , bachirbou@yahoo.fr A BSTRACT . In this study a three-dimensional finite element method analysis of repairing plate with bonded composite patch subjected to tensile load was presented. The effect of the corrosion on the damage of the adhesive (FM73) in the length of inclined crack is presented. The obtained results show that the increase of (D R ) is due to the increase of the inclination of the crack against it leads to the decrease of the values of the stress intensity factor in mode I ( K I ). K EYWORDS . Composite repair; Corrosion; Damage ratio; Finite element method (FEM); Stress intensity factor in mode I and mode II ( K I , K II ). Citation: Salem, M., Berrahou, M., Mechab, B., Bachir Bouadjra, B., Effect of the angles of the cracks of corroded plate in bonded composite repair, Frattura ed Integrità Strutturale, 46 (2018) 113-123. Received: 23.05.2018 Accepted: 18.06.2018 Published: 01.10.2018 Copyright: © 2018 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 onded composite repairs of metallic structure have become a useful aircraft structural life extension solution over the last two decades. These repairs provide an efficient method for restoring the ultimate load capability of the structure [1]. Alan Baker [2, 3] was the first otherwise the pioneer of these searches in the aeronautical and maritime research laboratory of the Royal Australian Air Force. The first published study on the corrosion of composite metal matrix (CMM) materials was probably that of Porter and Wolff in 1967. Current CMM corrosion resistance publications focus on matrix materials for the most part of aluminum reinforced with carbon or silicon carbide, with fibrous or particulate form. Composite materials with aluminum matrix reinforced with carbon fibers (C/Al) are the subject of this publication work. Composite materials (C/Al) clearly show very low resistance to corrosion in chloride media, whether in marine atmosphere, salt spray or immersion in seawater [4]. The various journals, gathering the results obtained on this topic before (1997), distinguish two main forms of corrosion in these materials: the hydrolysis of aluminum carbides (Al4C3) and the galvanic corrosion between carbon and aluminum [5, 6].Corrosion of composite materials (C/Al) is a topic that cannot be addressed without studying the influence of alloy reinforcement on corrosion resistance. The vast majority of authors are interested in the chemical nature of the B