Poisson's ratio had long been considered to be an intrinsic material property, confined within a narrow domain and governed solely by the geometry of interatomic bonds. Materials with designed heterogeneity allow for control over the Poisson's ratio. Poisson's ratios of any value within the thermodynamically admissible domain may be attained, including negative Poisson's ratio (termed auxetic). In this article, we discuss the role of Poisson's ratio in elasticity, two-dimensional and three-dimensional materials, phase transformations, underlying causes in the microstructure, and other negative physical properties.

中文翻译：

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负泊松比材料：拉胀固体

长期以来，泊松比一直被认为是一种固有的材料特性，被限制在一个狭窄的域内，并且仅受原子间键的几何形状的控制。具有设计异质性的材料允许控制泊松比。可以获得热力学允许域内任何值的泊松比，包括负泊松比（称为拉胀）。在本文中，我们将讨论泊松比在弹性、二维和三维材料、相变、微观结构中的根本原因和其他负面物理特性中的作用。