心脏支架、折纸艺术与超材料设计

发布时间：2018-01-29 21:42

本文关键词： 泊松比横向变形系数超材料纵向变形弹性范围 Poisson 外界压力广义相对论三角剖分中所 　出处：《科技导报》2017年10期 　论文类型：期刊论文

【摘要】：正泊松比(Poisson's ratio)是力学中的一个概念,它的定义是材料受到纵向压力(或拉力)的时候,在弹性范围内它的横向变形量与纵向变形量的比值,泊松比也叫横向变形系数。人们在日常生活中所见到的大部分材料的泊松比都在0~0.5之间,例如:空气的泊松比为0,铝的泊松比为0.33,水的泊松比为0.5。传统材料受到外力挤压的时候,在压力作用的方向会收缩,而同时在垂直于压力的方向会发生膨胀。而负泊松比材料则正好相反,当负泊松比材料受到外界压力的时候,其同时会在平行与垂直于外
[Abstract]:Poisson's ratio (Poisson's ratio) is a concept in mechanics, which is defined when the material is subjected to longitudinal pressure (or tensile force). In the elastic range, the ratio of transverse deformation to longitudinal deformation, Poisson's ratio is also called transverse deformation coefficient, and the Poisson's ratio of most materials in daily life is between 0 and 0.5. For example, the Poisson's ratio of air is 0, the Poisson's ratio of aluminum is 0.33, and the Poisson's ratio of water is 0.5. When the traditional material is squeezed by external force, it will shrink in the direction of pressure action. At the same time, the negative Poisson ratio material will expand in the direction perpendicular to the pressure. When the negative Poisson ratio material is subjected to the external pressure, it will be parallel and perpendicular to the outside at the same time.
【作者单位】：纽约州立大学石溪分校机械工程系;纽约州立大学石溪分校计算机系;
【分类号】：R318.08;TB30
【正文快照】： 泊松比(Poisson's ratio)是力学中来。负泊松比的弹性形变特的一个概念,它的定义是材料受到纵向性是由材料微观结构的几何压力(或拉力)的时候,在弹性范围内它模式决定的。图2显示了具的横向变形量与纵向变形量的比值,泊有负泊松比的动脉支架,它松比也叫横向变形系数。人们在日

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