Publications Internationales

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Subject: search.filters.subject.Composite materials

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Now showing 1 - 7 of 7
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    Experimental and numerical evaluation of Quasi-Static Indentation behaviour of laminates with polypropylene matrix
    (Polish Society of Composite Materials, 2021) Mahdad, M'Hamed; Benidir, Adel; Belaidi, Idir
    This paper presents an analysis of the damage process of composite laminates subjected to low-velocity quasi-static indentation (QSI) load. The laminates were prepared using the compression moulding technique. The composites were made from orthotropic layers with E-glass or steel fibres and a polypropylene matrix. The quasi-static indentation tests were carried out at three levels of indentation energy under low-velocity. The experimental results reveal that using steel fibres increases the perforation threshold, which alludes to the importance of the fibre type in delineating damage regions. In contrast, the evolution of the damage and the perforation resistance of glass fibre reinforced laminates is somewhat different. A numerical model based on a finite element program was developed to understand the mechanisms of damage evolution in the laminates. It in-volves implementing the Matzenmiller-Lubliner-Taylor (MLT) damage model. A comparison between the experimental and numerical results was also made
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    Experimental study of dielectric properties of composite materials pozzolan/DGEBA
    (2015) Irekti, Amar; Bezzazi, Boudjema; Smith, Agnès; Aribi, Chouaib
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    Impact of the fuselage damping characteristics and the blade rigidity on the stability of helicopter
    (Elsevier, 2013) Chellil, Ahmed; Nour, Abdelkader; Lecheb, Samir; Kebir, H.; Chevalie, Y.
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    Rheological behavior of the epoxy resin loaded with the pozzolan
    (2012) Irekti, Amar; Hami, Brahim; Aribi, C.; Bezzazi, B.; Briki, I.
    The study is to synthesize composite materials with news formul ations of thermosetting matrices by the incorporation of 40% of mineral fillers to reduce the cost of composite materials an d to improve implementation by increasing the viscosity and redu cing the withdrawal to its minimum value. The mineral filler increases si gnificantly in rheological parameters, whatever it nature of th e mineral filler. Compared to the control without charges, an increase of 60% of the shear stress and that of plastic viscosity were reco rded for the epoxy resin. The software Rheowine viscometer enabled us to m odel and identified the rheological behavior of these mixtures wit h resin. The results obtained in this modeling, confirmed that th e resin mixtures have shear-thinn ing rheological behavior, this last allows the model of the Ostwald de Waele
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    Reliability approach for fibre-reinforced composites design
    (2007) Dehmous, H.; Welemane, H.; Karama, M.; Ait Tahar, K.
    This study aims at investigating the mechanical reliability of unidirectional fibre-reinforced composites in view of their design optimization. Owing to the manufacturing process, many uncertainties affect inherently the properties of these materials. Besides, the brittle character of the fibre failure leads to important safety factors that limit their development for engineering applications. The objective is to get a realistic evaluation of the mechanical reliability of such structures which accounts for the various uncer- tainties involved. The effects of random design parameters on the composite failure are then investigated for different kinds of reinforcement (nature of fibre, mono-material or hybrid structures) with finite-element probabilistic solver PERMAS
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    Multilayer system of thermosetting polymers and specific confining : application to the walls of the hospital unit
    (Photon Excellence Award-2014 : The Journal of Materials Science, 2014) Bouzid, Mohammed; Djadi, A.; Aribi, C.; Irekti, Amar; Bezzazi, B.; Halouene, F.
    The nature of materials structuring our health institutions promote the development of germs. The sustainability of nosocomial infections remains significant (12% and 15%). One of the major factors being the portland cement which is brittle and porous. As part of a national plan to fight nosocomial infections, led by the University Hospital of Blida, we opted for a composite coating, application by multilayer model, composed of epoxy-polyester resin as a binder and calcium carbonate as mineral fillers. The application of composite materials reinforce the wall coating of hospital units and eliminates the hospital infectious areas. The resistance to impact, chemicals, raising temperature and to a biologically active environment, gives satisfactory results