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Article

Nano-Level Damage Characterization of Graphene/Polymer Cohesive Interface under Tensile Separation

1
School of Mechanical Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia
2
Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
3
Molecular Simulation Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846, Iran
4
Centre of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
5
Chancellory Office, National University of Malaysia, Bangi 43600, Selangor, Malaysia
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(9), 1435; https://doi.org/10.3390/polym11091435
Received: 30 June 2019 / Revised: 24 July 2019 / Accepted: 24 July 2019 / Published: 2 September 2019
(This article belongs to the Special Issue Graphene-Polymer Composites II)
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. View Full-Text
Keywords: adhesives; cohesive zone model; finite element method; graphene-polymer nanocomposite; graphene/polymer interface; molecular dynamics; regressive softening law adhesives; cohesive zone model; finite element method; graphene-polymer nanocomposite; graphene/polymer interface; molecular dynamics; regressive softening law
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MDPI and ACS Style

Koloor, S.S.R.; Rahimian-Koloor, S.M.; Karimzadeh, A.; Hamdi, M.; Petrů, M.; Tamin, M.N. Nano-Level Damage Characterization of Graphene/Polymer Cohesive Interface under Tensile Separation. Polymers 2019, 11, 1435. https://doi.org/10.3390/polym11091435

AMA Style

Koloor SSR, Rahimian-Koloor SM, Karimzadeh A, Hamdi M, Petrů M, Tamin MN. Nano-Level Damage Characterization of Graphene/Polymer Cohesive Interface under Tensile Separation. Polymers. 2019; 11(9):1435. https://doi.org/10.3390/polym11091435

Chicago/Turabian Style

Koloor, S. S.R., S. M. Rahimian-Koloor, A. Karimzadeh, M. Hamdi, Michal Petrů, and M. N. Tamin 2019. "Nano-Level Damage Characterization of Graphene/Polymer Cohesive Interface under Tensile Separation" Polymers 11, no. 9: 1435. https://doi.org/10.3390/polym11091435

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