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Buckling kinetics of graphene membranes under uniaxial compression

Aristotelis P. Sgouros*, Evangelos Drougkas†, Spyros V. Kallivokas‡, and Doros N. Theodorou

  • School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Street, Zografou Campus, GR-15780 Athens, Greece

  • *Author to whom correspondence should be addressed: arissgouros@gmail.com
  • †Present address: Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, Lyngby 2800, Denmark.
  • ‡Present addresses: (i) Computation-Based Science and Technology Research Center, The Cyprus Institute, Nicosia 2121, Cyprus; (ii) Department of Materials Science & Technology, University of Crete, Vasilika Vouton, GR-71003 Heraklion, Crete, Greece.

Phys. Rev. E 109, L023001 – Published 8 February, 2024

DOI: https://doi.org/10.1103/PhysRevE.109.L023001

Abstract

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 (σb) 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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