Strain rate effect on the mechanical properties of a glass fibre reinforced acrylic matrix laminate. An experimental approach
TypeArticles dans des revues avec comité de lecture
The aim of this study is to evaluate the effect of the loading rate on the mechanical properties and damage mechanisms of a Glass/Elium150 laminate composite. Quasi-static indentation (QS) and low energy dynamic impact (DYN) tests which simulate lifetime structural loadings (dropped tool, gravel impacts, …) are lead. A specific experimental approach is developed to compare results of both experiments. The effect of the loading rate on the structural response (stiffness, dissipated energy) of the composite is highlighted. The numerous damage mechanisms involved in the collapse of the material are observed at a microscopic scale using both optical and scanning electron microscopy (SEM). Finally an intra-laminar crack propagation mechanism is described based on post-mortem observations at ply scale to explain the formation of interlaminar cracks
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MAZEL, Vincent; GUERARD, Sandra; CROQUELOIS, Benjamin; KOPP, Jean-Benoit; GIRARDOT, Jérémie; DIARRA, Harona; BUSIGNIES, Virginie; TCHORELOFF, Pierre (Elsevier, 2016)Mechanical strength is an important critical quality attribute for tablets. It is classically measured, in the pharmaceutical field, using the diametral compression test. Nevertheless, due to small contact area between the ...
Study of the dynamic fracture of hollow spheres under compression using the Discrete Element Method CORE, Arthur; KOPP, Jean-Benoit; GIRARDOT, Jérémie; VIOT, Philippe (ELSEVIER, 2018)Hollow sphere structure (HSS) belongs to cellular solids that have been studied recently for its multiples properties. In our case, HSS aims to absorb soft impacts energy on an airliner cockpit. This structure is investigated ...
Breaking pharmaceutical tablets with a hole: Reevaluation of the stress concentration factor and influence of the hole size CROQUELOIS, Benjamin; GIRARDOT, Jérémie; KOPP, Jean-Benoît; CAZAUTETS, C.; TCHORELOFF, Pierre; MAZEL, Vincent (Elsevier BV, 2017)Mechanical strength is an important property for pharmaceutical tablets. Its study using the theory of linear elastic fracture mechanics has been introduced in the pharmaceutical field through the Brittle Fracture Index ...
A self-affine geometrical model of dynamic RT-PMMA fractures: implications for fracture energy measurements KOPP, Jean-Benoit; SCHMITTBUHL, Jean; NOEL, Olivier; FOND, Christophe (Springer, 2015)Profilometric imaging of fracture surfaces of rubber toughened polymer has been performed at two different resolutions (a) at large scales [10 μ\upmu m–25 mm] using an opto-mechanical profilometer and (b) at small scales ...
Experimental Investigation and Discrete Element Modelling of Composite Hollow Spheres Subjected to Dynamic Fracture CORE, Arthur; KOPP, Jean-Benoit; VIOT, Philippe; CHARLES, Jean-Luc; DAU, Frédéric (Hindawi Limited, 2017)This paper deals with the characterization and the numerical modelling of the collapse of composite hollow spherical structures developed to absorb energy during high velocity impacts. The structure is composed of hollow ...