...
首页> 外文期刊>Materials Science and Engineering >Elastic properties of a material composed of alternating layers of negative and positive Poisson's ratio
【24h】

Elastic properties of a material composed of alternating layers of negative and positive Poisson's ratio

机译:由正负泊松比交替层组成的材料的弹性特性

获取原文
获取原文并翻译 | 示例
           

摘要

The theory of elasticity predicts a variety of phenomena associated with solids that possess a negative Poisson's ratio. The fabrication of metamaterials with a 'designed' microstructure that exhibit a Poisson's ratio approaching the thermodynamic limits of 1/2 and -1 increases the likelihood of realising these phenomena for applications. In this work, we investigate the properties of a layered composite, with alternating layers of materials with negative and positive Poisson's ratio approaching the thermodynamic limits. Using the finite element method to simulate uniaxial loading and indentation of a free standing composite, we observed an increase in the resistance to mechanical deformation above the average value of the two materials. Even though the greatest increase in stiffness is gained as the thermodynamic limits are approached, a significant amount of added stiffness can be attained, provided that the Young's modulus of the negative Poisson's ratio material is not less than that of the positive Poisson's ratio material.
机译:弹性理论可预测与固体具有负泊松比的各种现象。具有“设计的”微观结构的超材料的制造,其表现出的泊松比接近热力学极限1/2和-1,从而增加了在应用中实现这些现象的可能性。在这项工作中,我们研究了具有负泊松比和正泊松比的交替材料层接近热力学极限的层状复合材料的性能。使用有限元方法模拟独立式复合材料的单轴加载和压痕,我们观察到在两种材料的平均值以上,其抗机械变形的能力有所提高。即使在接近热力学极限时获得了最大的刚度增加,只要负泊松比材料的杨氏模量不小于正泊松比材料的杨氏模量,也可以获得相当大的附加刚度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号