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Poisson's ratio sign-switching metamaterial with stiffness matrix asymmetry and different elastic moduli under tension and compression

EngineeringPhysicsAcoustic MetamaterialNegative-index MetamaterialMechanical EngineeringApplied PhysicsMetamaterialsRatio Sign-switching MetamaterialComputational ElectromagneticsStiffness Matrix AsymmetryDynamic MetamaterialsElectromagnetic MetamaterialsDifferent Elastic Moduli