Fabrication methods for auxetic foams
Fabrication methods for auxetic foams
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DOI：
10.1023/a:1018606926094
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发表时间：
1997-11-15
影响因子：
4.5
通讯作者：
Evans, KE
中科院分区：
文献类型：
--
作者：
Chan, N;Evans, KE
弹性材料具有负的泊松比，也就是说，当纵向拉伸时，它们横向膨胀。负泊松比是一种不寻常的特性，它影响材料的许多机械特性，例如抗压痕性、压缩、剪切刚度和动态性能的某些方面。拉胀泡沫材料的特殊力学性能归因于其微结构的变形特性。获得负泊松比的一种方法是通过使用凹入单元结构。发泡体由常规聚合物泡沫制成。描述了制作小型和大型拉胀泡沫试样的方法。
Auxetic materials have a negative Poisson's ratio, that is, they expand laterally when stretched longitudinally. Negative Poisson's ratio is an unusual property that affects many of the mechanical properties of the material, such as indentation resistance, compression, shear stiffness, and certain aspects of the dynamic performance. The unusual mechanical properties of auxetic foams are attributed to the deformation characteristics of re-entrant microstructures. One way of obtaining negative Poisson's ratio is by using a re-entrant cell structure. Auxetic foam was fabricated from a conventional polymeric foam. The fabrication method for making both small and large auxetic foam specimens is described.