TY - JOUR T1 - Numerical Analysis of the Behavior of Structures Damaged by Fatigue and Repaired by Composite Patch AU - Achache, Habib AU - Aıtkacı, Djaafar AU - Moulgada, Abdelmajid PY - 2018 DA - December JF - The Eurasia Proceedings of Science Technology Engineering and Mathematics JO - EPSTEM PB - ISRES Publishing WT - DergiPark SN - 2602-3199 SP - 35 EP - 42 IS - 4 LA - en AB - Inthis paper, a numerical study of the behavior of fatigue cracks of damagedcomposite repaired aeronautical structures was presented. Various parametershave been highlighted such as effect of the dimensions and mechanicalproperties of the patch as well as the orientation of the fibers and the effectof the dimensions and mechanical properties of the adhesive. Two geometricalmodels have been proposed in order to see the influence of the crack positionand the overall failure behavior under fatigue stress of the damaged structure.The results on the different geometric models of cracked plates and fissureplates from nicks show that composite patch repair is an effective techniquefor increasing plate strength, decreasing stress concentration and prolongingtheir service life. KW - Composite patch KW - Fatigue KW - Fiber orientation KW - Life time and propagation CR - Içten, B.M. and Karakuzu, R. (2002), The Effect of Composite Patches on the Failure of Adhesively-Bonded Joints Under Bending Moment. Compos. Sci. Technol., 62, 1259-1271. Elhannani, M., Madani, K., Mokhtari, M., Touzain, S., Feaugas, X. and Cohendoz, S. (2016), “A new analytical approach for optimization design of adhesively bonded single-lap joint”, Struct. Eng. Mech., 59(2), 313-326. Benchiha, A. and Madani, K. (2015), “Influence of the presence of defects on the stresses shear distribution in the adhesive layer for the single-lap bonded joint”, Struct. Eng. Mech., 53(5), 1017-1030. Benchiha, A., Madani, K., Touzain, S., Feaugas, X. and Ratwani, M. (2016), “Numerical analysis of the influence of the presence of disbond region in adhesive layer on the stress intensity factors (SIF) and crack opening displacement (COD) in plates repaired with a composite patch”, Steel Compos. Struct., 20(4), 951-962. Erdogan, F. and Ratwani, M. (1971), “Stress distribution in bonded joints”, J. Compos. Mater., 5(3), 378- 393. Costa, T.R.F. Serrano, A.M., Atman, A.P.F., Loguercio, A.D. and Reis, A. (2012), “Durability of composite repair using different surface treatments”, J. Dentist., 40(6), 513-521. Fekirini, H.; Bachir Bouiadjra , B.; Belhouari, M.; Boutabout, B.; Serier, B. (2008), Numerical analysis of the performances of bonded composite repair with two adhesive bands in aircraft structures, Composite structures, 82:84-89 Bachir Bouiadjra, B.B.; Fekirini, H.; Serir, B.; Belhouari, M.; and Benguediab, M. (2008), Energy Release Rate for Repaired Inclined Cracks with Bonded Composite Patch Having Two Adhesive Bands in Aircraft Structures, Journal of reinforced plastic and composites, 28:1135-1146. Heller, M.; Kaye, R. (2002); Shape Optimisation for Bonded Repairs, Advances in the Bonded Composite Repair of Metallic Aircraft Structure, Pages 269-315 Kaddouri, K.; Ouinas, D.; Bachir Bouiadjra, B. (2008); FE analysis of the behaviour of octagonal bonded composite repair in aircraft structures, Computational Materials Science, 43:1109-1111 Ouinas, D.; Hebbar, A.; Bachir Bouiadjra, B.; Belhouari, M.; Serier, B. (2009); Numerical analysis of the stress intensity factors for repaired cracks from a notch with bonded composite semicircular patch, Composites Part B: Engineering, 40: 804-810 Bachir Bouiadjra, B.; Fekirini, H.; Serier, B.; and Benguediab, M. (2007); SIF for Inclined Cracks Repaired with Double and Single Composite Patch, Mechanics of Advanced Materials and Structures, 14:303–308 Belhouari, M.; Bachir Bouiadjra, B.; Megueni, A.; Kaddouri, K. (2004); Comparison of double and single bonded repairs to symmetric composite structures: a numerical analysis, Composite Structures, 65: 47-53 Bachir Bouiadjra, B.; Achour, T.; Berrahou, M.; Ouinas, D.; Feaugas, X (2010).; Numerical estimation of the mass gain between double symmetric and single bonded composite repairs in aircraft structures, Materials & Design, 31: 3073-3077 UR - https://dergipark.org.tr/en/pub/epstem/issue//494340 L1 - https://dergipark.org.tr/en/download/article-file/592016 ER -