In this study, the finite element method is used to analyze the effect of hygrothermal aging of composite on the stress intensity factor variation for the crack repaired with bonded composite patch. The obtained results show that moisture absorption has a negative effect on the repair performance. Indeed, the stress intensity factor increases with an increase in the water absorption in both mode I and mixed mode of crack propagation. The fatigue life of the repaired structures decreases with the increase in water absorption by the composite patch.
Baker A.Repair of cracked or defective metallic aircraft components with advanced fiber composites - an overview ofAustralian work. Compos Struct1984; 2: 153-181.
2.
Baker AA, Roberts JD and Rose LRF.Use of joint parameters in estimating the K reduction due to crack patching . In: Proceedings of an International Workshop on Defence Applications for Advanced Repair Technology for Metal and Composite Structure, Naval Research Labs, Washington, 1981, pp. 335-354.
3.
Bachir Bouiadjra B., Rezgani L., Ouinas D., Belhouari M. and Ziadi A.Numerical analysis of the notch effect and the behaviour of notch crack in adhesively bonded composite laminates. Comput Mater Sci2007 ; 38: 759-764.
Goland M. and Reissner E.The stress in cemented joints. J Appl Mech1994; 11: A17-A27.
6.
Adams R. and Wake W.Structural adhesive joints in engineering. London : Elsevier Applied Science, 1984 .
7.
Baker AA, Rose LRF and Jones R.Advances in the bonded composite repair of metallic airframe structures . Oxford: Elsevier Applied Science , 2002.
8.
Bachir Bouiadjra B., Belhouari M. and Serier B.Computation of the stress intensity factors for repaired cracks with a bonded composite patch in mode I and mixed mode . Compos Struct2002; 56: 401-416.
9.
Megueni A., Bachir Bouiadjra B. and Boutabout B.Computation of the stress intensity factors for patched crack with a bonded composite repair in pure mode II. Compos Struct2003; 59: 415-418.
10.
Baker AA and Jones R.Bonded repair of aircraft structures. Dordrecht : Martinus Nijhoff, 1988.
11.
Baker AA, Callinan RJ, Davis MJ, Jones R. and Williams JGRepair of Mirage iii aircraft using BFRP crack patching technology . Theor Appl Fract Mech1984; 2: 1-16.
12.
Baker AARepair of cracked or defective metallic components with advanced fibber composites: an overview ofAustralian work. Compos Struct1984; 2: 153-181.
13.
Baker AA and Chester RJRecent advances in bonded composite repair technology for metallic aircraft components. In: Proceedings of the International Conference on Advanced Composite Materials, Wollongong , Australia, 1993, pp. 45-49.
14.
Rose LRF.An application of the inclusion analogy for bonded reinforcements. Int J Solid Struct1981; 17: 827-838.
15.
Ji-Hua Z. and Mao-Sheng Z.Visual experiments for water absorbing process of fiber-reinforced composites. J Compos Mater2004; 38: 779-790.
16.
De L.a Osa O., Alvarez VA, Fraga AN, Martínez Mammone E. and Vázquez A.Loss of mechanical properties by water absorption of vinyl-ester reinforced with glass fiber. J Reinf Plast Compos2006 ; 25: 215-221.
17.
Adams DFA micromechanics analysis of the influence of the interface on the performance of polymer matrix composites. J Reinf Plast Compos1987; 6: 66-88.
18.
Madhu S, Madhukar and Lawrence T. Drzal.Fiber-matrix adhesion and its effect on composite mechanical properties: IV. Mode I and mode II fracture toughness of graphite/epoxy composites. Compos Mater1992; 26(7): 936-968.
19.
Jana S. and Zhong WHEffects of hygrothermal conditions and UV radiation on UHMWPE fibers/nanofiber- epoxy composites. J Compos Mater2007; 41: 2897-2914.
20.
Hu B., Gong J. and Verchery G.Effet d’environnement hygrothermique sur les comportements mécaniques des composites à matrice epoxyde. In: JNC; Proceedings of the 11th Conference of the French Society for Composite Materials , Arcachon, France, 18-20 November 1998 , pp. 255-264 (in French).
21.
Yang GC, Zeng HM, Li JJ, Jian NB and Zhang WBRelation of modification and tensile properties of sisal fiber. Acta Sci Nat Uni Sunyatseni1996; 35: 53-57.
22.
Thwe MM and Liao K.Effects of environmental ageing on the mechanical properties of bamboo glass fiber reinforced polymer matrix hybrid composites. Composites Part A2002; 33: 43-52.
23.
Nguyen T., Byrd WE, Alsheh D., Aouadi K. and Chin JWWater at the polymer/substrate interface and its role in durability of polymer/glass fiber composites. In: Proceedings of the 1st International Conference on the Durability of Fibre Reinforced Polymer Composites for Construction , Sherbrooke, Canada, 1998, pp. 451-462.
24.
Bezzerrouki M., Bachir Bouiadjra B. and Ouinas D.SIF for cracks repaired with single composite patch having two adhesive bands and double symmetric one in aircraft structures. Comput Mater Sci2008; 44: 542-546.
25.
Bachir Bouiadjra B., Achour T., Berrahou M., Ouinas D. and Feaugas X.Numerical estimation of the mass gain between double symmetric and single bonded composite repairs in aircraft structures . Mater Des2010; 31: 3073-3077.
26.
Kim J-H. and Paulino GHOn fracture criteria for mixed-mode crack propagation in functionally graded materials. Mech Adv Mater Struct2007; 14: 227-244.
27.
Oudad W., Bachir Bouiadjra B., Belhouari M., Touzain S. and Feaugas X.Analysis of the plastic zone size ahead of repaired cracks with bonded composite patch of metallic aircraft structures. Comput Mater Sci2009; 46: 950-954.
28.
Bachir Bouiadjra B., Fekirini H., Serier B. and Benguediab M.Numerical analysis of the beneficial effect of the double symmetric patch repair compared to single one in aircraft structures . Comput Mater Sci2007; 38: 824-829.
29.
Henshel RD and Shaw KGCrack tip finite elements are unnecessary. Int J Numer Methods Eng1975; 9: 495-507.
