Reference : From SEM images to elastic responses: a stochastic multiscale analysis of UD fiber re...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/218670
From SEM images to elastic responses: a stochastic multiscale analysis of UD fiber reinforced composites
English
Wu, Ling mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
Chung, Chi Nghia [Johannes Kepler University Linz - JKU > Institute of Polymer Product Engineering > > >]
Major, Zoltan [Johannes Kepler University Linz - JKU > Institute of Polymer Product Engineering > > >]
Adam, Laurent [e-Xstream Engineering > > > >]
Noels, Ludovic mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3) >]
1-Apr-2018
Composite Structures
Elsevier Science
189C
206-227
Yes (verified by ORBi)
International
0263-8223
[en] Multiscale ; Stochastic ; Unidirectional Composites ; Stochastic Volume Elements ; Micro-structures generator ; LIMARC
[en] In this work, the elastic response of unidirectional fiber (UD) reinforced composites is studied in a stochastic multiscale way. First, the micro-structure of UD carbon fiber reinforced composites is statistically studied based on SEM images of its cross-section and an algorithm to generate numerical micro-structures with an equivalent random distribution of fibers is developed. In particular, based on the images spatial analysis, the empirical statistical descriptors are considered as dependent variables and represented using the copula framework, allowing generating micro-structure realizations used as Stochastic Volume Elements (SVEs). Second, a stochastic scale transition is conducted through the homogenization of SVEs. With a view to the use of the resulting meso-scale random field in structural stochastic analyzes, the homogenization is performed in two steps in order to respect the statistical content from the micro-meter-long
SVEs to the millimeter-long structural finite elements. To this end, the computational homogenization is applied in a hierarchy model: i) Micro-structure generator produces Small SVEs (SSVEs) which are homogenized; ii) Big SVEs (BSVEs) are constructed from the SSVEs. Finally, it is shown on simple illustrative examples that the scatter of the (homogenized) stress distribution in a composite ply can be simulated by means of the developed methodology.
Aérospatiale et Mécanique - A&M
Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06
The research has been funded by the Walloon Region under the agreement no 1410246 - STOMMMAC (CT-INT2013-03-28) in the context of the M-ERA.NET Joint Call 2014.
http://hdl.handle.net/2268/218670
10.1016/j.compstruct.2018.01.051
https://doi.org/10.1016/j.compstruct.2018.01.051
NOTICE: this is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures 189C, 2018, 206-227, doi:10.1016/j.compstruct.2018.01.051
FP7 ; 291826 - M-ERA.NET - From materials science and engineering to innovation for Europe.

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