Study of multiple cracks repair by collage of composite patches

Study of multiple cracks repair by collage of composite patches

Yamina Chelahi Chikr

Laboratoire de mécanique physique des matériaux (LMPM), Université Djillali Liabes, cité Ben M’Hidi, BP 89, Sidi Bel Abbès, Algérie

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Using the finite element method, the present study deals first, with the behavior of a cracked structure repaired and not repaired by a patch, then the interaction effect between two surface cracks moving in opposite directions. The stress intensity factors (SIFs) and adhesive stresses will be estimated; the transverse and longitudinal displacements of a crack for an invariable length will be studied, as well as the effect of a crack oriented on a plane inclined with respect to the main crack. The results obtained clearly indicate that the interaction effect is decisive when these cracks are very close to each other. In this case, the distribution of shear stresses in the adhesive layer along the virtual line is also analyzed using the finite element method.


finite elements, cracks, displacements, interaction, stress intensity factors (SIFs), adhesive stresses

1. Introduction
2. Présentation du logiciel
3. Résultats et discussions
4. Interaction entre deux fissures de longueur fixes
5. Déplacement horizontal de la fissure (b) par rapport à la fissure (a)
6. Déplacement vertical de la fissure (b) par rapport à la fissure (a)
7. Déplacement incliné de la fissure (b) par rapport à la fissure (a)
8. Analyse et résultats
9. Analyse des contraintes de cisaillements dans la couche adhésive
10. Conclusion générale

Adams R.D., Wake W.C. (1984). Structural adhesive joints in engineering. Elsevier Applied Science Publishers, London.

Baker A. (1999). Bonded composite repair of fatigue-cracked primary aircraft structure. J. Compos. Struct., vol. 47, p. 431-444.

Baker A., Rose F., Jones R. (2002). Advances in the bonded composite repair of metallic aircraft structures. Elsevier, ISBN : 0-08-042699-9. vol. 1 et 2.

Cognard J. (2004). Science et technologie du collage. Presse polytechnique et universitaires romandes, ISBN : 2-88074-410-5, disponible en bibliothèque.

Dillard D.A., Pocius A.V. (2002). The mechanics of adhesion. Elsevier, ISBN : 0-444-51-140-7.

Fredell R.S., van Barnveld W., Vlot A. (1994). Analysis of composite crack patching of fuselage structures: high patch modulus isn’t the whole story. Sampe Int. Symp., vol. 39.

Madani K. (2007). Étude numérique et expérimentale de la technique de réparation des structures aéronautiques par patch en composite, cas de l’aluminium 2024-T3 réparée par composite de carbone/epoxy. Thèse, université du SBA-UDL, p. 32-214.

Megson T.H.G. (1999). Aircraft structures for engineering students. 3rd ed. Elsevier.

Messler R.W. Jr. (2004). Joining of materials and structures. Elsevier, ISBN : 0-7506-7757-0.

Nicholas T. (1997). Critical issues in high cycle fatigueJ. Fatigue, vol. 21, p. 221-231.

Ouinas D. (2005). Étude du comportement en rupture des structures en bimatériaux. Applications aux collages. Thèse, université du SBA-UDL, p. 15.

Ouinas D., Bouiadjra B., Serier B., Said Bekkouche M. (2007). Comparison of the effectiveness of boron/epoxy and graphite/epoxy patches for repaired cracks emanating from a semicircular notch edge. J. Compos. Struct., vol. 80, p. 514-522.