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首页> 外文期刊>International journal of non-linear mechanics >An atomistic-based Foeppl-von Karman model for graphene
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An atomistic-based Foeppl-von Karman model for graphene

机译:基于原子的Foeppl-von Karman石墨烯模型

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We deduce a non-linear continuum model of graphene for the case of finite out-of-plane displacements and small in-plane deformations. On assuming that the lattice interactions are governed by the Brenner's REBO potential of 2nd generation and that self-stress is present, we introduce discrete strain measures accounting for up-to-the-third neighbor interactions. The continuum limit turns out to depend on an average (macroscopic) displacement field and a relative shift displacement of the two Bravais lattices that give rise to the hexagonal periodicity. On minimizing the energy with respect to the shift variable, we formally determine a continuum model of Foppl-von Karman type, whose constitutive coefficients are given in terms of the atomistic interactions.
机译:对于有限的平面外位移和较小的平面内变形,我们推导了石墨烯的非线性连续体模型。假设晶格相互作用受第二代Brenner的REBO势控制,并且存在自应力,我们引入离散应变测量方法,考虑到多达三分之一的邻居相互作用。结果证明,连续极限取决于平均(宏观)位移场和两个产生六边形周期性的布拉维晶格的相对位移。关于最小化位移变量的能量,我们正式确定了Foppl-von Karman类型的连续模型,其本构系数是根据原子相互作用给出的。

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