Vibration analysis of a pre-stressed graphene sheet embedded in a deformable matrix

TL;DR

This paper presents a theoretical study on how initial uniaxial stress and elastic matrix embedding affect the vibration behavior of a graphene sheet, highlighting the dominant influence of foundation shear modulus and small-scale effects.

Contribution

It introduces a nonlocal Kirchhoff plate model for pre-stressed graphene embedded in an elastic foundation, analyzing the sensitivity of vibration response to various parameters.

Findings

Shear modulus of the foundation significantly affects natural frequency.

Small-scale effects are more pronounced with fully clamped edges.

Vibration response varies with control parameters in the model.

Abstract

The effect of the initial uniaxial stress and a surrounding elastic matrix on the transverse vibration response of a single-layered graphene sheet (SLGS) is investigated through a theoretical formulation that is based on the nonlocal Kirchhoff plate theory. The surrounding elastic matrix of the SLGS is modeled as a foundation of the Pasternak-type. The elliptic partial differential equation governing the dynamics of the pre-stressed SLGS is solved with the Rayleigh method. Numerical results from the analyses reveal different level of sensitivity of the vibration response of the SLGS to changes in the control parameters of the model. Pareto charts of the effect of the control parameters in the mathematical model show the shear modulus of the foundation to have the most dominant influence on the fundamental natural frequency of the SLGS. The small-scale effect is found to have more pronounced effect on the vibration response of the SLGS when it is fully clamped at the four edges.