▎ 摘　　要

In this research, a new model was presented to estimate the strength of graphene/polymer nanocomposites. This model, called "the laminate analogy progressive damage (LA-PD) model", is a combination of the laminate analogy (LA) approach and a progressive damage model. A nanocomposite was replaced by an equivalent laminated composite (ELC) which contain several isooriented layers. An incremental algorithm was presented to simulate the stress-strain behavior of nanocomposites up to the final failure. First, using the Mori-Tanaka method, the stiffness tensor of the aligned-graphene composite was calculated. Then, using the classical lamination theory (CLT) the elastic modulus of the ELC was obtained. The maximum stress criteria were used to detect the damaged layers. After degrading the stiffness of damaged layers, the elastic modulus of the ELC was updated for the next strain increment. The results show that the tensile modulus and strength increased significantly by increasing the Graphene nanoplatelet (GNP) aspect ratio. However, for aspect ratios higher than about 500, the magnitude of these improvements decreased. A comparison of the results of the present model with the available experimental data in the literature proves the validity of the model.