University of Guilan Computational Sciences and Engineering 2783-2503 1 2 2021 09 01 Micromechanical determination of elastic modulus and Poisson's ratio of graphene/polymer nanocomposites 153 159 5120 10.22124/cse.2021.20826.1020 EN Jamaloddin Jamali American University of the Middle East Mohammad Kazem Hassanzadeh-Aghdam Department of Engineering Science, Faculty of Technology and Engineering, East of Guilan, University of Guilan, Rudsar-Vajargah, Iran Journal Article 2021 10 13 The elastic modulus and Poisson’s ratio of polymer matrix nanocomposites (PMNCs) filled with graphene nanoplatelets (GNPs) are determined using an analytical micromechanical model. It is assumed that the GNPs are uniformly dispersed and randomly oriented into the polymer matrix. Due to the folded and wrinkled structure of GNPs, the effect of their flatness ratio on the elastic properties is investigated. Moreover, the micromechanical model captures the creation of interfacial region between the graphene and polymer matrix. The results show that addition of graphene particles into the polymer matrix can enhance the nanocomposite elastic modulus. Poisson’s ratio of polymer matrix increases with the increase of graphene content. It is observed that the elastic properties are decreased by the GNP non-flatness structure. Also, the material and dimensional characteristics of interfacial region affects the elastic modulus and Poisson’s ratio of GNP-reinforced PMNCs. The model predictions agree very well with the experimental data. https://cse.guilan.ac.ir/article_5120_dec717985c5665120af8521f2a281971.pdf