Modelling of interface stress transfer in graphene monolayer nanocomposites under static extension load

5th International Conference Recent Trends in Structural Materials

Petrova, T.^1,3 ; Kirilova, E.^1 ; Becker, W.^2 ; Ivanova, J.^3

Institute of Chemical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl.103, Sofia

1113, Bulgaria^1

Institute of Structural Mechanics, TU Darmstadt, Franziska-Braun-Str. 7, L501 347a, Darmstadt

64287, Germany^2

European Polytechnical University, Pernik

2300, Bulgaria^3

关键词: Constitutive law;    Continuity conditions;    Interface behaviour;    Interface delamination;    Interface stress;    Interfacial stress transfer;    Non-linear algebraic system;    Polyethylene terephthalates (PET);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012067/pdf
DOI  :  10.1088/1757-899X/461/1/012067

来源: IOP

【 摘 要 】

An investigation on the interfacial stress transfer in nanocomposite between a monolayer of graphene and a common size polyethylene terephthalate (PET) matrix under extensional traction applied to the matrix is presented. The constitutive law describing the behaviour of the interface is assumed to be a bi-linear cohesive one. Three zones are defined along the interface: elastic, cohesive and delaminated. The system of ordinary differential shear lag equations together with boundary, symmetric and continuity conditions is solved consequently at each zone and the respective solutions are fitted at common points. The values of these common points - the ends of the lengths of the elastic, cohesive and delaminated zones are determined using the solutions of two nonlinear algebraic system equations about them. All results are illustrated in figures and discussed in detail. A comparison of the results obtained with the model considered and experimental data is done and confirms that for the structure of a length 21.8 nm the interface delamination is not observed. The implemented method offers a simple tool to understand the nature of the interface behaviour and evaluation of the damaging of the nanostructure.