Réponse à l'impact de plaques composites épaisses préchargées en tension uniaxiale.
TypeCommunications avec actes
This study concerns Carbon / epoxy composite plates. Three di erent thickness were investigated ([0°=45°=90°=45°]i)S for i = 2, 3 or 4 (5, 10 and 15mm thick). An instrumented falling-weight-impact test machine was used for test in this work. Impact energies were 30 J to 214 J. Tensile preloadings were de ned according to the ultimate tensile strength of the plates (300 to 3000 micro strain). Tests were de ned using Doelhert design of experiments for which parameters were thickness, tensile preloading and impact energy and were performed on a drop tower. Impact behavior were characterized from impact force and displacement measurements. The strain state of back sheet was determined using digital correlation. Damage was characterized using non destructive control technique and deply technique.Post impact tension are carried to characterize the residual strength and to see the dammage evolution.
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GUILLAUD, Nicolas; FROUSTEY, Catherine; DAU, Frédéric; VIOT, Philippe (elsevier, 2014)This work focuses on the impact response of composite plates 5 mm thick subjected to uniaxial tension preload. Laminated carbon/epoxy with quasi-isotropic stacking sequence ([0/45/90/-45]2)S samples were used. Doehlert-type ...
The influence of acrylate triblock copolymer embedded in matrix on composite structures’ responses to low-velocity impacts DENNEULIN, Sébastien; VIOT, Philippe; LEONARDI, Frédéric; LATAILLADE, Jean-Luc (Elsevier, 2012)In passive safety structures the use of composite materials has increased significantly recently due to their low specific mass and high energy absorption capacities. The purpose of this experimental study is to describe ...
Polypropylene foam behaviour under dynamic loadings: Strain rate, density and microstructure effects BOUIX, Rémy; VIOT, Philippe; LATAILLADE, Jean-Luc (Elsevier, 2009)Expanded polypropylene foams (EPP) can be used to absorb shock energy. The performance of these foams has to be studied as a function of several parameters such as density, microstructure and also the strain rate imposed ...
VIOT, Philippe; BALLERE, Ludovic; GUILLAUMAT, Laurent; LATAILLADE, Jean-Luc (Elsevier, 2008)For several years, composite materials have taken a significant part in the realization of structures designed for transport (aeronautical, nautical, automotive. . .). In order to qualify the behavior of such structures, ...
BALLERE, Ludovic; VIOT, Philippe; LATAILLADE, Jean-Luc; GUILLAUMAT, Laurent; CLOUTET, S (Elsevier, 2008)The final aim of this study is to evaluate the influence of impact damage on the residual strength of carbon/epoxy vessels stressed by internal pressure. An intermediate stage determined the residual behaviour of pre-impacted ...