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首页> 外文期刊>Physica status solidi, B. Basic research >Negative Poisson's ratio in periodic porous graphene structures
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Negative Poisson's ratio in periodic porous graphene structures

机译：周期性多孔石墨烯结构中的负泊松比

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We conducted molecular statics simulations to investigate the negative Poisson's ratio (auxetic behavior) of periodic porous graphene structures based on the rotating rigid unit mechanism. To obtain a negative Poisson's ratio, simple voids were periodically introduced into graphene. We showed that the Poisson's ratio of the designed graphene structure is strongly dependent on the aspect ratio of the voids, and it can approach the theoretical limit of -1.0. More importantly, the graphene periodic structure maintains its auxetic behavior even under large strains (epsilon similar to 0.20). Hence, it can be employed in a wide range of applications requiring structures that can endure large deformation. In addition, we found that the key factor in the auxeticity of the investigated structures is the deformation occurring at the void tips. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机译：我们进行了分子静态模拟，以研究基于旋转刚性单元机理的周期性多孔石墨烯结构的负泊松比（膨胀行为）。为了获得负泊松比，将简单的空隙定期引入石墨烯中。我们表明，设计的石墨烯结构的泊松比在很大程度上取决于空隙的纵横比，并且可以接近-1.0的理论极限。更重要的是，石墨烯的周期性结构即使在较大的应变下（ε近似于0.20）也能保持其膨胀性。因此，它可以在需要结构能够承受大变形的广泛应用中使用。此外，我们发现，所研究结构的膨胀性的关键因素是空隙尖端处发生的变形。 （C）2016 WILEY-VCH Verlag GmbH＆Co.KGaA，魏因海姆

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