Non-symmetric Stiffness of Origami-Graphene Metamaterial Plates
Composite structures(2022)
摘要
Mechanical metamaterials exhibit exceptional mechanical properties that originate from their topological design. In the current study, we designed a novel metamaterial which incorporates origami-graphene with single crystal copper matrix. Unlike classical auxetic materials which have void phase, the proposed origami-graphene based metamaterials appear to be solid in the microscopic scale, and the origami-graphene metamaterial plates may have relative stronger stiffnesses. Based on the molecular dynamics (MD) simulations, we confirmed that the elastic properties of origami-graphene/Cu metamaterials are anisotropic, size-dependent, and temperature-dependent, and the in-plane Poisson’s ratios are negative. More important, we discovered that the stiffness of the origami-graphene/Cu metamaterial plates is non-symmetry in the phase of linear elasticity.
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关键词
Metamaterials,Origami-graphene,Non-symmetric stiffness,Molecular dynamics
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