Poisson's Ratio Assessment of Different Auxetic Structures With and Without Nonlinear Geometric Effects

Poisson's Ratio Assessment of Different Auxetic StructuresWith and Without Nonlinear Geometric Effects Nasser Taghizadieh1, Ali Jalali21-Associate Professor, Faculty of Civil Engineering, University of Tabriz2- PhD Student, Faculty of Civil Engineering, University of [e-mail][e-mail]2 AbstractUnlike traditional materials, when an auxetic material is stretched, it expand laterally and when it iscompressed, it tend to get thinner. These extremely unusual materials do not defy the laws of elasticitytheory. It is only in the last 12 years that any such material also known as negative Poisson ratio materialhas been fabricated. In this paper different shape of auxetic structures such as anti-tetra-chiral, missing ribstructure, re-entrant structures have be ...