Comparative study of auxetic geometries by means of computer-aided design and engineering
Comparative study of auxetic geometries by means of computer-aided design and engineering
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DOI：
10.1088/0964-1726/21/10/105004
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发表时间：
2012-10-01
影响因子：
4.1
通讯作者：
Diaz Lantada, Andres
中科院分区：
文献类型：
--
作者：
Alvarez Elipe, Juan Carlos;Diaz Lantada, Andres
弹性材料（或超材料）是具有负泊松比（NPR）的材料，在拉伸时显示出意外的横向膨胀特性，在压缩时显示出相等和相反的致密化特性。这种几何形状正逐步用于开发新产品，特别是在智能可扩展致动器、形状变形结构和微创植入式设备领域。虽然几个拉胀和潜在的拉胀几何形状已经总结了在以前的审查和研究，精确的信息有关的设计任务的相关属性并不总是provided.In这项研究中，我们提出了一个比较研究的二维和三维的拉胀几何形状进行的计算机辅助设计和工程工具（从现在开始CAD-CAE）。研究的第一部分集中在一个CAD库的生长。一旦库被开发，我们模拟不同的拉胀几何形状的行为，并详细阐述了系统的比较，考虑这些几何形状的相关属性，如泊松比（S），可达到的最大体积或面积减少和等效杨氏模量，希望它可以提供有用的信息，为未来的设计设备的基础上，这些有趣的结构。
Auxetic materials (or metamaterials) are those with a negative Poisson ratio (NPR) and display the unexpected property of lateral expansion when stretched, as well as an equal and opposing densification when compressed. Such geometries are being progressively employed in the development of novel products, especially in the fields of intelligent expandable actuators, shape morphing structures and minimally invasive implantable devices. Although several auxetic and potentially auxetic geometries have been summarized in previous reviews and research, precise information regarding relevant properties for design tasks is not always provided.In this study we present a comparative study of two-dimensional and three-dimensional auxetic geometries carried out by means of computer-aided design and engineering tools (from now on CAD-CAE). The first part of the study is focused on the development of a CAD library of auxetics. Once the library is developed we simulate the behavior of the different auxetic geometries and elaborate a systematic comparison, considering relevant properties of these geometries, such as Poisson ratio(s), maximum volume or area reductions attainable and equivalent Young's modulus, hoping it may provide useful information for future designs of devices based on these interesting structures.