hal-01358967
https://hal.science/hal-01358967
doi:10.1016/j.compositesb.2016.08.026
[UNIV-BREST] Université de Bretagne occidentale - Brest (UBO)
[ENSTA-BRETAGNE] ENSTA Bretagne
[CNRS] CNRS - Centre national de la recherche scientifique
[UNIV-UBS] Université de Bretagne Sud
[UBS] Université de Bretagne Sud
[ENIB] Ecole Nationale d'Ingénieurs de Brest
[IRDL] Institut de Recherche Dupuy de Lôme - CNRS FRE 3744
[ENSTA-BRETAGNE-MECA] Département Mécanique
Random versus periodic microstructures for elasticity of fibers reinforced composites
Bouaoune, L.
Brunet, Yves
El Moumen, Ahmed
Kanit, Toufik
Mazouzi, H.
[SPI] Engineering Sciences [physics]
ART
Particle-reinforcement
Microstructures
Stress concentration
Finite element analysis
Fiber reinforced composites
Periodic microstructures
Homogenization of effective elastic properties of fiber reinforced composites frequently supposed periodic arrangement of fibers because such microstructures allow analytical or low computational cost integrations. Hexagonal frame was often preferred than square one which is strongly anisotropic. In practical situations those periodical microstructures are not realistic. Real microstructures are often random or if they are periodic their boundaries don't fit with the periodic scheme. We studied with the help of finite elements samples that exhibit hexagonal arrangement of fibers embedded in a random distribution. Characteristic length scales of hexagonal area were extracted from observation of stress maps. Principal results are a short scale in which bulk and shear stresses become structured. On the other hand we nether reached a size large enough to observe local stress maps similar to those produced by a periodic model.
2016-10
en
Composites Part B: Engineering
Elsevier