Article (Scientific journals)
On the effect of grains interface parameters on the macroscopic properties of polycrystalline materials
Akbari, Ahmad; Kerfriden, Pierre; Bordas, Stéphane
2018In Computers and Structures, 196, p. 355-368
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Keywords :
Polycrystalline microstructure; Cohesive interface; Multiscale modelling; Computational homogenisation; Yield surface; Stress-strain curve
Abstract :
[en] In this paper, the influence of microscopic parameters on the macroscopic behaviour of polycrystalline materials under different loading configuration is investigated. Linear elastic grains with zero thickness cohesive interfaces are considered at the microscale with in depth introduction of effective parameters. A multiscale method based on homogenisation technique is employed to bridge the scales. In order to minimize the homogenisation error, a representative volume element (RVE) of the microscopic structure is statistically determined to be used in the numerical analysis. For each loading condition of the RVE, several numerical examinations are conducted to illustrate the relationship between the microscopic parameters. Finally, the effects of microscopic critical fracture energies, maximum tensile and shear strengths of grain interfaces on the mechanical properties, i.e. stress-strain curve and yield surface at the macroscale are discussed in details. It is shown that macroscopic yield surface and stress strain curves can be used to characterise the microscopic properties.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Akbari, Ahmad
Kerfriden, Pierre
Bordas, Stéphane ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
External co-authors :
yes
Language :
English
Title :
On the effect of grains interface parameters on the macroscopic properties of polycrystalline materials
Publication date :
February 2018
Journal title :
Computers and Structures
ISSN :
0045-7949
Publisher :
Elsevier, United Kingdom
Volume :
196
Pages :
355-368
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
European Projects :
FP7 - 279578 - REALTCUT - Towards real time multiscale simulation of cutting in non-linear materials with applications to surgical simulation and computer guided surgery
Funders :
EPSRC - Engineering and Physical Sciences Research Council [GB]
Fonds National de la Recherche FWO-FNR grant
ERC STG grant
Cardiff School of Engineering
FP7 IRSES programme MULTIFRAC
CE - Commission Européenne [BE]
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