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Scale and size effects on dynamic response and damage of glass/epoxy tubular structures ArchiMer
Tarfaoui, Mostapha; Gning, P.b.; Davies, Peter; Collombet, F.
The impact behavior of composite materials has been extensively studied but interest has been centered on flat plates. For underwater applications, thick composite cylinders are employed and several questions must be addressed concerning the influence of accidental impact. The aim of this work is to study the dynamic response of tubular structures. Such structures find many applications but the damage upon impact is not taken into account during their dimensioning. However, at the time of their handling or in service the damage introduced by accidental impact can compromise their capacity to fulfill their function. The cylinders are thick and consist of epoxy matrix and glass fiber reinforcement. After having observed the nature of the damage related to...
Tipo: Text Palavras-chave: Size effect; Scale effect; Damage; Impact; Filament winding.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2458.pdf
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Influence of winding pattern on the mechanical behavior of filament wound composite cylinders under external pressure ArchiMer
Hernandez Moreno, H; Douchin, B; Collombet, F; Choqueuse, Dominique; Davies, Peter.
The influence of winding pattern on the mechanical response of filament Wound glass/epoxy cylinders exposed to external pressure is studied by testing cylindrical specimens having stacked layers with coincident patterns in a hyperbaric testing chamber. Different analytical models are evaluated to predict buckling pressure and modes of thin wall cylinders (diameter to thickness ratio d/h of 25) and satisfactory predictions are obtained which are in the same order of magnitude that those obtained in experimental results. Test results show no evident pattern influence on either strength (implosion pressure) or buckling behavior (buckling modes) of thin wall or thick wall (d/h of 10) cylinders. (c) 2007 Elsevier Ltd. All rights reserved.
Tipo: Text Palavras-chave: Cylindrical shells; Buckling; Filament winding; Polymer matrix composites.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-3823.pdf
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