Výsledky vyhledávání - "Pierre Alart"

Calcul intensif en mécanique multicontact : de l’élastostatique à la dynamique granulaire

Autor: Pierre ALART

Publikováno v: Modélisation numérique en mécanique fortement non linéaire ISBN: 9781789490817

Cet article synthétise quelques travaux menés au LMGC, depuis une vingtaine d'années, sur le calcul intensif dédié aux problèmes de mécanique impliquant un grand nombre de contacts. Les situations considérées vont de l'équilibre de système

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4ffe01ff2c92a34d06669b2b504e5477
https://doi.org/10.51926/iste.9081.ch2

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On inconsistency in frictional granular systems

Autor: Pierre Alart, Mathieu Renouf

Publikováno v: Computational Particle Mechanics
Computational Particle Mechanics, 2018, 5 (2), pp.161-174. 〈10.1007/s40571-017-0160-9〉
Computational Particle Mechanics, Springer Verlag, 2018, 5 (2), pp.161-174. ⟨10.1007/s40571-017-0160-9⟩

International audience; Numerical simulation of granular systems is often based on a discrete element method. The nonsmooth contact dynamics approach can be used to solve a broad range of granular problems, especially involving rigid bodies. However,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa64664904915c868bf4663fc202cc48
https://hal.archives-ouvertes.fr/hal-01522746

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How to overcome indetermination and interpenetration in granular systems via nonsmooth contact dynamics. An exploratory investigation

Autor: Pierre Alart

Publikováno v: Computer Methods in Applied Mechanics and Engineering
Computer Methods in Applied Mechanics and Engineering, Elsevier, 2014, 270, pp.37-56. ⟨10.1016/j.cma.2013.11.020⟩

International audience; The present paper is an exploratory investigation to overcome difficulties encountered in the simulation of dense granulates when a NSCD approach is used. Some simple examples permit identification of impulse indetermination a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb26692b430d8836f115097bea3c1b1d
https://doi.org/10.1016/j.cma.2013.11.020

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High performance computing of discrete nonsmooth contact dynamics with domain decomposition

Autor: Pierre Alart, Vincent Visseq, David Dureisseix

Publikováno v: International Journal for Numerical Methods in Engineering. 96:584-598

This work was realized with the support of HPC@LR, a Center of Competence in High-Performance Computing from the Languedoc-Roussillon region, funded by the Languedoc-Roussillon region, Europe and University Montpellier 2 Sciences et Techniques. The H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92f3ec7d22e59fac01044f5cfac95ea9
https://doi.org/10.1002/nme.4578

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Domain decomposition with discrete element simulations using shared-memory parallel computing for railways applications

Autor: David Dureisseix, Pierre Alart, Gilles Saussine, Thi Minh Phuong Hoang

Publikováno v: Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics
Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics, Hermès / Paris : Lavoisier 2012, 21 (3-6), pp.242-253. 〈10.1080/17797179.2012.714723〉
Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics, Hermès / Paris : Lavoisier 2012, 21 (3-6), pp.242-253. ⟨10.1080/17797179.2012.714723⟩

Numerical simulation with discrete elements leads to several issues for large-scale problems and long loading times, as for the granular dynamic simulations of the ballasted railway behaviour. To reduce computational costs, we study the use of two st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37af9ae726a5ce8d233197dbb0082e46
https://doi.org/10.1080/17797179.2012.714723

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Mixed versus impulse-oriented domain decomposition method for granular dynamics

Autor: Damien Iceta, Pierre Alart, David Dureisseix

Publikováno v: Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics
Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics, Hermès / Paris : Lavoisier 2009, 18 (5-6), pp.429-443. ⟨10.3166/ejcm.18.429-443⟩
Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics, Hermès / Paris : Lavoisier 2009, 18 (5-6), pp.429-443. 〈10.3166/ejcm.18.429-443〉

International audience; In this article, we are concerned with the numerical simulation of granular media, characterized as a large scale discrete system, involving non smooth interactions. For such problems, domain decomposition approaches are poten

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04eb6eaafb020f2b4c2e76b55102dc5f
https://doi.org/10.3166/ejcm.18.429-443

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Solveurs parallèles pour la simulation de systèmes multicontacts

Autor: Pierre Alart, Mathieu Renouf

Publikováno v: Revue Européenne des Eléments Finis
Revue Européenne des Eléments Finis, Hermès, 2004, pp.691-702
Revue Européenne des Éléments Finis
Revue Européenne des Éléments Finis, HERMÈS / LAVOISIER, 2004, pp.691-702

Dans le cadre des systemes multicontacts, et en particulier des milieux granulaires, la methode de dynamique des contacts (Non Smooth Contact Dynamics) integre un solveur de type Gauss Seidel non lineaire a chaque pas de temps. Nous proposons ici deu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8feb8084cae08b31f7dfb3e48238c1c6
https://doi.org/10.3166/reef.13.691-702

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Confined buckling of inextensible rods by convex difference algorithms

Autor: Stéphane Pagano, Pierre Alart

Publikováno v: Comptes Rendus Mécanique
Comptes Rendus Mécanique, Elsevier Masson, 2002, 330, pp.819-824
Comptes Rendus Mécanique, Elsevier, 2002, 330, pp.819-824. ⟨10.1016/S1631-0721(02)01547-4⟩

In this Note we present an approach to determine the local minima of a specific class of minimization problems. Attention is focused on the inextensibility condition of flexible rods expressed as a nonconvex constraint. Two algorithms are derived fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd9971b35eb807eff4b2b24c67119015
https://doi.org/10.1016/s1631-0721(02)01547-4

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Modélisation de problèmes non linéaires de grande taille : grandes déformations et autocontact dans un milieu cellulaire

Autor: Pierre Alart, Mikaël Barboteu, Stéphane Pagano

Publikováno v: Revue Européenne des Éléments Finis. 11:447-461

On presente une modelisation numerique du comportement non lineaire d'un milieu cellulaire sous fortes sollicitations par la mise en oeuvre de methodes numeriques performantes. Les non-linearites sont les grandes deformations et les conditions d'auto

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::14475bd553e6ba2158a2a06406e8dc22
https://doi.org/10.3166/reef.11.447-461

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Towards an augmented domain decomposition method for nonsmooth contact dynamics models

Autor: Vincent Visseq, Pierre Alart, David Dureisseix

Publikováno v: Computational Particle Mechanics
Computational Particle Mechanics, Springer Verlag, 2014, 1 (1), pp.15-26. ⟨10.1007/s40571-014-0005-8⟩
Computational Particle Mechanics, 2014, 1 (1), pp.15-26. 〈10.1007/s40571-014-0005-8〉

International audience; This paper explores the numerical performances of algorithms enriched by an augmented interface problem in a domain decomposition method dedicated to nonsmooth dynamic systems. Starting from simulations on a single time step,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::113712cc1938b4b1c546b39393937e5e
https://hal.archives-ouvertes.fr/hal-00998116

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