Browsing by Author "Manaa Rabah"

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    Effet de la séquence d’empilement sur la rupture des plaques stratifiées perforées en carbone/époxy
    (Revue des composites et des matériaux avancés, 2013) BREK Samir; Manaa Rabah; Zidani Kamel; Hannachi Bouzid
    The assembly of laminated plate structures or hybrid composite/metal is a key passage in the achievement of aeronautical and aerospace structures, so it is necessary to conduct drilling operations in the laminated plates. The arrangement of fibers and their orientation can change the mechanical properties of the fold, so the designer can change at will the strength of laminated plates by adjusting the fiber orientation and stacking sequence. We consider it essential to take into account the effect of holes and the fiber orientation on all the failure mechanisms. In this work we showed the effect of fiber orientation in each ply and the choice of stacking sequence on tensile strength of laminated plates multi-hole material carbon/epoxy composite loaded in tension.
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    Modélisation de la rupture d’un pli unidirectionnel perforé
    (Revue des Composites et des Matériaux Avancés, 2009) BREK Samir; Manaa Rabah; Zidani Kamel; Zedira Hamma; Djebaili Hamid
    The Composite materials are the subject of several studies because of their high specific characteristics and advantages of the latter to adapt to mechanical stress from a judicious preparation of matrix and reinforcement, particularly laminates of Unidirectional Carbon / Epoxy, are increasingly used for the realization of structures. However, the holding of composite structures can be greatly reduced by the addition of geometric singularitie. This work is to determine the critical distance between two holes in one ply unidirectional carbon / epoxy, tensional and study the effect of the factor of stress concentration on the total ruin and brutal (that is to say wide mixture of fiber and matrix for a unidirectional ply).
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    Prévision de la ruine des composites stratifiés perforés sous chargement thermomécanique
    (Revue des composites et des matériaux avancés, 2011) BREK Samir; Zidani Kamel; Djebaili Hamid; Manaa Rabah; Zedira Hamma
    The laminated composite structures in the form of plates are increasingly used for the design of mechanical structures. These are generally resistant structures, capable of withstanding mechanical loading and thermo mechanical important. Although the analysis of composite structures is required to a key point in the design of structures, there is lack of studies for laminated composite perforated, especially for high gradient structures are sought by monotonic or cyclic thermo mechanical loading, the transverse cracking is usually the first damage observed in the matrix as a fold disoriented relative to the axis of solicitation. In this work we propose a numerical study to calculate the critical distances between two holes in the plates laminated carbon / epoxy loaded by thermomechanical loadings, we used a software structural analysis by finite element method (Castem2009).