Article (Scientific journals)
Estimating fibres’ material parameter distributions from limited data with the help of Bayesian inference
Rappel, Hussein; Beex, L. A. A.
2019In European Journal of Mechanics. A, Solids, 75, p. 169-196
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Keywords :
Bayesian inference; Bayes’ theorem; Copula; Fabrics; Fibrous materials; Foams; Gaussian copula; Random networks; Stochastic parameter identification; Bayesian networks; Complex networks; Geometry; Inference engines; Parameter estimation; Stochastic systems; Struts; Yarn; Fibrous material; Random network; Random processes
Abstract :
[en] Numerous materials are essentially structures of discrete fibres, yarns or struts. Considering these materials at their discrete scale, one may distinguish two types of intrinsic randomness that affect the structural behaviours of these discrete structures: geometrical randomness and material randomness. Identifying the material randomness is an experimentally demanding task, because many small fibres, yarns or struts need to be tested, which are not easy to handle. To avoid the testing of hundreds of constituents, this contribution proposes an identification approach that only requires a few dozen of constituents to be tested (we use twenty to be exact). The identification approach is applied to artificially generated measurements, so that the identified values can be compared to the true values. Another question this contribution aims to answer is how precise the material randomness needs to be identified, if the geometrical randomness will also influence the macroscale behaviour of these discrete networks. We therefore also study the effect of the identified material randomness to that of the actual material randomness for three types of structures; each with an increasing level of geometrical randomness. © 2019 Elsevier Masson SAS
Disciplines :
Electrical & electronics engineering
Author, co-author :
Rappel, Hussein ;  Université de Liège - ULiège
Beex, L. A. A.;  Institute of Computational Engineering, Faculty of Science, Technology and Communication, University of Luxembourg, Maison du Nombre, 6, Avenue de la FonteEsch-sur-Alzette 4364, Luxembourg
Language :
English
Title :
Estimating fibres’ material parameter distributions from limited data with the help of Bayesian inference
Publication date :
2019
Journal title :
European Journal of Mechanics. A, Solids
ISSN :
0997-7538
Publisher :
Elsevier, Netherlands
Volume :
75
Pages :
169-196
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 May 2021

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