| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Czarnota, Christophe
Laboratory of Microstructure Studies and Mechanics of Materials
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Spark plasma sintering and mechanical properties of two grades of <scp>PEKK</scp> presenting different Tere/Iso ratios
- 2024Experimental and Numerical Analysis of Aluminum-Polyethylene Composite Structure Subjected to Tension and Perforation Under Dynamic Loading for a Wide Range of Temperaturescitations
- 2023Lateral ring compression test applied to a small caliber steel jacket: Identification of a constitutive modelcitations
- 2021Extension of 1D linear stability analysis based on the Bridgman assumption. Applications to the dynamic stretching of a plate and expansion of a ringcitations
- 2020Steady shock waves in porous metals: Viscosity and micro-inertia effectscitations
- 2020Dynamic response of ductile materials containing cylindrical voidscitations
- 2020Extension of linear stability analysis for the dynamic stretching of plates: Spatio-temporal evolution of the perturbationcitations
- 2018Shock structure in porous metals: The interplay of material strain rate dependency with micro-inertia effects
- 2015A predictive hybrid force modeling in turning: application to stainless steel dry machining with a coated groove toolcitations
- 2014Modeling of the abrasive tool wear in metal cutting: Influence of the sliding-sticking contact zones
- 2014A new abrasive wear law for the sticking and sliding contacts when machining metallic alloyscitations
- 2013Analytical stochastic modeling and experimental investigation on abrasive wear when turning difficult to cut materialscitations
- 2013Statistical approach for modeling abrasive tool wear and experimental validation when turning the difficult to cut Titanium Alloys Ti6Al4Vcitations
- 2013Experimental Parameters Identification of Fatigue Damage Model for Short Glass Fiber Reinforced Thermoplastics GFRPcitations
- 2013Modeling of the abrasive tool wear in metal cutting: Influence of the sliding-sticking contact zones
- 2013Modeling of velocity-dependent chip flow angle and experimental analysis when machining 304L austenitic stainless steel with groove coated-carbide toolscitations
- 2008Modelling of dynamic ductile fracture and application to the simulation of plate impact tests on tantalumcitations
- 2006Ductile damage of metallic materials under dynamic loading – Application to spalling
Places of action
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article
Extension of linear stability analysis for the dynamic stretching of plates: Spatio-temporal evolution of the perturbation
Abstract
International audience ; Being able to predict fragment distributions in terms of speed and size, following the fracture of thin metallic shells subjected to dynamic expansion, is of major importance for civil and military applications. For ductile metals, this fracture process is initiated by plastic flow instability resulting in necking, i.e. the occurrence of local thinnings where the plastic deformation is localized. Since decades, linear stability analyses have been carried out to study the multiple necking formation via a perturbation of the fundamental state. The underlying assumption related to the linear stability analyses developed so far is the time scale separation (meaning that the development of the instability is much faster than the evolution of the fundamental state), see Fressengeas and Molinari (1994) or Shenoy and Freund (1999). The aim of the work is to propose an extended linear stability analysis which can tackle situations where the time scale separation hypothesis is no more satisfied (i.e. at very large strain rates). The proposed methodology is exemplified by considering the dynamic extension of a plate under plane strain condition; the material behavior being modeled adopting various constitutive laws from rate insensitive to thermo-viscoplastic ones. The role of initial perturbation (or defect) is discussed. While the role of the initial conditions is important at the early stage of the deformation process, their influence on the growth rate and on the dominant mode are negligible at large strain for moderate loading rate. One main feature of the proposed model is the estimation of the amplitude development of each mode. A strong difference in the amplitude predictions is revealed between the new model and the classical linear stability analysis of the literature, even if the growth rates are comparable for both approaches at late deformation stage. However, history effect related to the amplitude of a given mode, originating from the early stage process, may lead to strong amplitude ...