Size Dependence of the Nonlinear Elastic Softening of Nanoscale Graphene Monolayers under Plane-Strain Bulge Tests: A Molecular Dynamics Study

Figure 5

(color online) (a) The relation of 𝑝𝑎⁴ and ℎ³ follows the power law while linear elastic solution obeys a linear relation. (b) The power law exponents range 𝑛=0.1868∼0.2112 that are significantly smaller than the linear elastic response of 𝑛=1. (c) The extrapolations of the estimated power law exponents predict the nonlinear softening behavior to disappear and converge to linear elasticity around the specimen size of 2.0∼4.5  μm.

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(b)

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