Strain rate effect on the mechanical properties of a glass fibre reinforced acrylic matrix laminate. An experimental approach
Article dans une revue 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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Article dans une revue avec comité de lectureKOPP, Jean-Benoit; GIRARDOT, Jérémie (Scientific Research Publishing, Inc., 2021)The influence of temperature on the resistance to rapid crack propagation of a semi-crystalline bio-based polymer was studied. The experimental results described in this study allow to initiate a first discussion ...
Breaking pharmaceutical tablets with a hole: Reevaluation of the stress concentration factor and influence of the hole size Article dans une revue avec comité de lectureCROQUELOIS, Benjamin; GIRARDOT, Jérémie; KOPP, Jean-Benoit; CAZAUTETS, Clément; TCHORELOFF, Pierre; MAZEL, Vincent (Elsevier, 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 ...
Article dans une revue avec comité de lectureKOPP, Jean-Benoit; GIRARDOT, Jérémie (Springer Verlag, 2020)The fracture behaviour of a semi-crystalline bio-based polymer was studied. Dynamic fracture tests on strip band specimens were carried out. Fracture surfaces were observed at different scales by optical and electron ...
Article dans une revue avec comité de lectureSAGE, Margaux; GIRARDOT, Jérémie; KOPP, Jean-Benoît; MOREL, Stéphane (Elsevier BV, 2022)This work aims to propose a new damaging beam-lattice model using the Discrete Element Method paradigm dedicated to the simulation of quasi-brittle fracture under complex loadings. Enrichment of the elastic Euler–Bernoulli ...
Article dans une revue avec comité de lectureMAZEL, 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 ...