A discrete element approach for modeling the 3D thermal-induced damage

Autor: Hassan, Ghassan Alhajj, Humblet, Solange, Martic, Gregory, Bellenger, Emmanuel, Leclerc, Willy, Tandja, Meric, Guessasma, Mohammed, Pelegris, Christine, Duquennoy, Marc, Gonon, Maurice
Přispěvatelé: Laboratoire des technologies innovantes - UR UPJV 3899 (LTI), Université de Picardie Jules Verne (UPJV), Sirris - Software Engineering & ICT Group, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Transduction, Propagation et Imagerie Acoustique - IEMN (TPIA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), University of Mons [Belgium] (UMONS), TORCK, Kathleen
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: 13th World Congress on Computational Mechanics, WCCM XIII, and 2nd Pan American Congress on Computational Mechanics, PANACM II
13th World Congress on Computational Mechanics, WCCM XIII, and 2nd Pan American Congress on Computational Mechanics, PANACM II, Jul 2018, New York, NY, United States.
ISSN: 0045-7949
Popis: International audience; This work is treated in the framework of CUBISM project funded by INTERREG V program. The purpose of theproject is to develop a pressure and humidity SAW sensor, in order to follow the drying of refractory materials underhigh temperature and pressure conditions. More precisely, we aim to describe and predict the thermo-mechanicalbehavior of the piezoelectric SAW substrate under such conditions for a full set of geometrical configurations andmaterials. Besides, we expect to take into account the micro-cracks resulting from thermal expansion mismatchbetween the substrate and its environment. However, at the microscopic scale, the finite element method is lesssuitable to describe discontinuities induced by micro-cracks. For that reason, we propose to study thethermo-mechanical behavior using the discrete elements method (DEM). This choice is also motivated by theadvantage of DEM to describe the crack propagation. This contribution presents significant improvement for DEM tomodel the 3D thermal-induced damage due to thermal expansion. Furthermore, this study allows to follow thedamage level of the material during its lifetime. Thanks to the MULTICOR3D++ code developed in our laboratory, ahybrid particulate-lattice model [1], based on the equivalence between a granular system and a network of cohesivebeam elements, is generated. Our contribution is to introduce the linear thermal expansion at the scale of thecontact by modifying the initial free length of each link, using the model introduced in 2D by [2]. Heat transfer byconduction is taken into account, what requires contact areas which can be computed using two approaches. Thefirst one consists in calibrating a coefficient describing the mean ratio between particle and contact areas. Thesecond one is to associate a polyhedral element to each particle, using the concept of representative elements.Besides, we study the characteristics of materials in terms of the number of discrete elements, also the equivalentstress and strain of each particle are determined using a representative area. In addition, a model of damageresulting from thermal expansion was introduced. We consider that the fracture occurs when the hydrostatic stressfor local tensile solicitations is greater than a given tensile strength limit. [1] H. Haddad. Modélisation ducomportement thermomécanique de l’interface de contact par une approche couplée MED-MEF. PhD thesis,France, 2013. [2]W. Leclerc, H. Haddad, M. Guessasma. On a Discrete Element Method to simulatethermal-induced damage in 2D composite materials, In Computers & amp;amp;amp;amp;amp;amp;amp;amp;amp;Structures, 2017, ISSN 0045-7949.
Databáze: OpenAIRE
Externí odkaz: