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Structural Engineering and Mechanics Volume 57, Number 2, January25 2016 , pages 295-313 DOI: https://doi.org/10.12989/sem.2016.57.2.295 |
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Effect of stacking sequence of the bonded composite patch on repair performance |
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Hadja Imane Beloufa, Djamel Ouinas, Mostapha Tarfaoui
and Noureddine Benderdouche
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| Abstract | ||
| In this study, the three-dimensional finite element method is used to determine the stress intensity factor in Mode I and Mixed mode of a centered crack in an aluminum specimen repaired by a composite patch using contour integral. Various mesh densities were used to achieve convergence of the results. The effect of adhesive joint thickness, patch thickness, patch-specimen interface and layer sequence on the SIF was highlighted. The results obtained show that the patch-specimen contact surface is the best indicator of the deceleration of crack propagation, and hence of SIF reduction. Thus, the reduction in rigidity of the patch especially at adhesive layer-patch interface, allows the lowering of shear and normal stresses in the adhesive joint. The choice of the orientation of the adhesive layer-patch contact is important in the evolution of the shear and peel stresses. The patch will be more beneficial and effective while using the cross-layer on the contact surface. | ||
| Key Words | ||
| composite bonded patch; sequence of ply; adjacent cross-layer; contact surface of repair; stress intensity factor (SIF); finite element analysis | ||
| Address | ||
| Hadja Imane Beloufa, Djamel Ouinas: Laboratoire de Modelisation Numerique et Experimentale des Phenomenes Mecaniques, Faculty of Sciences and Technology, University Abdelhamid Ibn Badis of Mostaganem, 27000, Algeria Mostapha Tarfaoui: Laboratoire Brestois de Mecaniqueet des Systemes, ENSTA Bretagne, 2 Rue Francois Verny, 29806 Brest Cedex 9, France Noureddine Benderdouche: SEA2M, Faculty of Sciences and Technology, University Abdelhamid Ibn Badis of Mostaganem, 27000, Algeria | ||