Akademik Veri Yönetim Sistemi
COST ACTION CA21121 - European Network for the Mechanics of Matter at the Nano-Scale (MecaNano), Vienna, Austria, Vienna, Avusturya, 1 - 03 Mayıs 2024, ss.61
In the literature, much work has been done to model graphene nanocomposites by molecular dynamics or microscale simulations. Most of these studies are limited to the evaluation
of the elastic stiffness. However, investigation of the viscoelastic and viscoplastic stress-strain
response at larger strains is lacking. This study presents a microscale approach to simulate
the stress-strain response of graphene nanocomposites subjected to large deformation, by considering the interfacial interaction between the filler and the matrix. A multiscale framework
for the viscoelastic-viscoplastic response of platelets like inclusions reinforced nanocomposite
materials is presented. The Mori–Tanaka homogenization scheme is utilized to explore the
macroscopic properties of graphene-reinforced composites and an effective modulus definition is implemented into the Cooperative-viscoplasticity theory based on overstress (VBO)
model. For the visco-plastic deformation, Takayanagi averaging approach is used. Numerical
simulations are conducted on graphene platelet-reinforced epoxy nanocomposite for several
design parameters. Stress-strain behaviors of these materials under compression are simulated and depicted by comparing the experimental data in addition to relaxation behavior
at different strain levels.