Structural Mechanics of Negative Stiffness Honeycomb Metamaterials

Abstract The development of multi-stable structural forms has attracted considerable attention in the design architected multi-materials, metamaterials, and morphing structures, as a result some unusual properties such negative stiffness and, possibly, Poisson's ratio. Multi-stability is achieved through morphological change shape upon loading, doing so structures undergo transitions from one equilibrium state to another. This paper investigates performance honeycomb (NSH) metamaterials made double curved beams which are emerging various applications sensors, actuators, lightweight impact protective with tunability recoverability. An analytical treatment pursued using Euler–Lagrange theorem stability been studied. Based on static analysis nonlinear elastic system, developed tangent matrix ensuing deformation curve were assessed multiple phases deformation. closed-form solution was good agreement numerical finite element (FE) model at different bistability ratios. It shown that ratio had pronounced effect overall response desired negativity could be high