29/08/2012 Jana Faes
Meso scale modeling of the mechanical properties of steel-
reinforced epoxy
PhD Symposium December 2012
Jana FaesWim Van Paepegem
Department of Materials Science and Engineering, Ghent University
FACULTY OF ENGINEERING
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STEEL FILAMENT
EPOXY MATRIX
YARN (BUNDLE OF FILAMENTS)
Meso scale modeling of steel reinforced epoxy
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Carbon and glass fibreare BRITTLE
Steel fibresare DUCTILE
ELASTIC deformations up to failure
(brittle) failure is avoided in applications
research limited to elastic regime
PLASTIC deformations & necking before failing
(future) applications might involve damage
research must focus on damage & failure
Meso scale modeling of steel reinforced epoxy
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Meso scale modeling of steel reinforced epoxy
filament-matrix debonding
yarn-matrix delamination
fibre necking
plastic matrix deformation
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Macro
Meso
Micro
structural level
yarn level
fiber level
weft yarn
warp yarn
ONE YARN
fiber filaments
CARBON WHEELS
WEAVE UNIT CELL
Meso scale modeling of steel reinforced epoxy
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GOAL
composite unit cell
Meso scale modeling of steel reinforced epoxy
homogenisation
homogeneous unit cell
DEMAND
Unit cell must behave as if it were part of the material structure
periodic boundary conditions
QUESTION
Will these periodic boundaries still apply when looking at damage?