Micromechanical Modeling of Graphene Platelets Based Nanocomposites

Bakbak O., Çolak Çakır Ö. Ü.

COST ACTION CA21121 - European Network for the Mechanics of Matter at the Nano-Scale (MecaNano), Vienna, Austria, Vienna, Austria, 1 - 03 May 2024, pp.61

  • Publication Type: Conference Paper / Summary Text
  • City: Vienna
  • Country: Austria
  • Page Numbers: pp.61
  • Yıldız Technical University Affiliated: Yes


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.