Buckling kinetics of graphene membranes under uniaxial compression

AP Sgouros and E Drougkas and S Kallivokas and DN Theodorou, PHYSICAL REVIEW E, 109, L023001 (2024).

DOI: 10.1103/PhysRevE.109.L023001

Despite past investigations of the buckling instability, the kinetics of the buckling process is not well understood. We develop a generic framework for determining the buckling kinetics of membranes under compressive stress (sigma b) via molecular dynamics simulations. The buckling time (tb) is modeled by an extended Boltzmann-Arrhenius-Zhurkov equation accounting for temperature (T) and scale-dependent bending rigidity. We discern three regimes: (I) tb decreases with T; (II) tb increases with T; (III) tb is T independent. Regime II coheres with the predictions of the theory of fluctuating sheets (TFS). Regime I is seen at small scales due to fluctuations about equilibrium and is not predicted by the TFS.

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