Article (Scientific journals)
Multiscale modelling framework for the fracture of thin brittle polycrystalline films - Application to polysilicon
Mulay, Shantanu; Becker, Gauthier; Vayrette, Renaud et al.
2015In Computational Mechanics, 55 (1), p. 73-91
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Keywords :
Polysilicon; Discontinuous Galerkin; Multiscale; MEMS; Fracture; LIMARC
Abstract :
[en] Micro-electro-mechanical systems (MEMS) made of polycrystalline silicon are widely used in several engineering fields. The fracture properties of polycrystalline silicon directly affect their reliability. The effect of the orientation of grains on the fracture behaviour of polycrystalline silicon is investigated out of the several factors. This is achieved, firstly, by identifying the statistical variation of the fracture strength and critical strain energy release rate, at the nanoscopic scale, over a thin freestanding polycrystalline silicon film, having mesoscopic scale dimensions. The fracture stress and strain at the mesoscopic level are found to be closely matching with uniaxial tension experimental results. Secondly, the polycrystalline silicon film is considered at the continuum MEMS scale, and its fracture behaviour is studied by incorporating the nanoscopic scale effect of grain orientation. The entire modelling and simulation of the thin film is achieved by combining the discontinuous Galerkin method and extrinsic cohesive law describing the fracture process.
Research center :
Computational & Multiscale Mechanics of Materials
Disciplines :
Materials science & engineering
Mechanical engineering
Author, co-author :
Mulay, Shantanu;  Université de Liège - ULiège > Department of Aerospace and Mechanical Engineering > Computational & Multiscale Mechanics of Materials
Becker, Gauthier ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Vayrette, Renaud;  Université Catholique de Louvain - UCL
Raskin, Jean-Pierre;  Université Catholique de Louvain - UCL
Pardoen, Thomas;  Université Catholique de Louvain - UCL
Galceran, Moncerrat;  CIC Energigune
Godet, Stéphane;  Université Libre de Bruxelles - ULB
Noels, Ludovic  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Language :
English
Title :
Multiscale modelling framework for the fracture of thin brittle polycrystalline films - Application to polysilicon
Publication date :
January 2015
Journal title :
Computational Mechanics
ISSN :
0178-7675
eISSN :
1432-0924
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
Volume :
55
Issue :
1
Pages :
73-91
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Name of the research project :
FRFC 2.4508.11, PDR T.0122.13 “MECANO”, IAP 7/21
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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