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Nano-level damage characterization of graphene/polymer cohesive interface under tensile separation

Koloor, S. S. R. and Koloor, S. M. Rahimian and Karimzadeh, A. and Hamdi, M. (2019) Nano-level damage characterization of graphene/polymer cohesive interface under tensile separation. Polymers, 11 (9). p. 1435. ISSN 2073-4360


Official URL: http://dx.doi.org/10.3390/polym11091435


The mechanical behavior of graphene/polymer interfaces in the graphene-reinforced epoxy nanocomposite is one of the factors that dictates the deformation and damage response of the nanocomposites. In this study, hybrid molecular dynamic (MD) and finite element (FE) simulations of a graphene/polymer nanocomposite are developed to characterize the elastic-damage behavior of graphene/polymer interfaces under a tensile separation condition. The MD results show that the graphene/epoxy interface behaves in the form of elastic-softening exponential regressive law. The FE results verify the adequacy of the cohesive zone model in accurate prediction of the interface damage behavior. The graphene/epoxy cohesive interface is characterized by normal stiffness, tensile strength, and fracture energy of 5 × 10-8 (aPa·nm-1), 9.75 × 10-10 (nm), 2.1 × 10-10 (N·nm-1) respectively, that is followed by an exponential regressive law with the exponent, α = 7.74. It is shown that the commonly assumed bilinear softening law of the cohesive interface could lead up to 55% error in the predicted separation of the interface.

Item Type:Article
Uncontrolled Keywords:Adhesives, Molecular dynamics
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:88501
Deposited By: Widya Wahid
Deposited On:15 Dec 2020 08:19
Last Modified:15 Dec 2020 08:19

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