André Dragon
Institut Pprime
14 Papers
84 Citations
André Dragon is an academic researcher from Institut Pprime. The author has contributed to research in topics: Plasticity & Adiabatic shear band. The author has an hindex of 9, co-authored 14 publications.
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Papers
Investigation of fragments size resulting from dynamic fragmentation in melted state of laser shock-loaded tin
TL;DR: In this article, an experimental characterization, theoretical modelling and simulation of the micro-spalling process in tin is presented, with a specific emphasis on the size of the melted droplets.
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Dynamic vs. quasi-static shear failure of high strength metallic alloys: Experimental issues
Patrice Longère,André Dragon +1 more
TL;DR: In this paper, the authors investigated the competition between micro-mechanisms at the origin of failure of metals when submitted to shear-pressure loading at low and high strain rates.
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Skew photonic Doppler velocimetry to investigate the expansion of a cloud of droplets created by micro-spalling of laser shock-melted metal foils
D. Loison,T. de Rességuier,André Dragon,Patrick Mercier,Jacky Benier,Gaspard Deloison,Emilien Lescoute,Arnaud Sollier +7 more
TL;DR: In this article, a photonic Doppler velocimeter is used to probe the whole cloud of ejecta, which is roughly consistent with a one-dimensional theoretical description accounting for laser shock loading, wave propagation, phase transformations, and fragmentation.
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Coupling Between Mesoplasticity and Damage in High-cycle Fatigue
TL;DR: In this paper, a damage model based on the interaction between mesoplasticity and local damage for the infinite and the finite fatigue life regimes is presented. But the model is difficult in this fatigue regime because the scale where the mechanisms operate is not the engineering scale (macroscopic scale), and local plasticity and damage act simultaneously.
Modeling the Transition between Dense Metal and Damaged (Microporous) Metal Viscoplasticity
Patrice Longère,Patrice Longère,Anne-Gaëlle Geffroy,Anne-Gaëlle Geffroy,Bruno Leblé,André Dragon +5 more
TL;DR: In this article, a physically motivated approach was developed in order to describe the transition of behavior between dense metal plasticity and microporous metal polysilicon plasticity in three dimensions.
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