Effect of a negative Poisson ratio in the tension of ceramics.
Effect of a negative Poisson ratio in the tension of ceramics.
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DOI：
10.1103/physrevlett.100.245502
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发表时间：
2008-06
影响因子：
8.6
通讯作者：
F. Song;J. Zhou;Xianghong Xu;Yi Xu;Yi-long Bai
中科院分区：
文献类型：
--
作者：
F. Song;J. Zhou;Xianghong Xu;Yi Xu;Yi-long Bai
实验揭示了自然层状陶瓷拉伸变形中的负泊松比效应。这种效应可以使单位体积的体积应变能增加1100%，同时使单位体积的变形应变能降低约44%，从而使材料的拉伸变形能力有效地提高约1个数量级。本研究还表明，产生这种效应的物理机制归因于天然材料中纳米结构的相互攀爬，这为合成增韧复合材料的设计提供了指导。
The effect of a negative Poisson ratio is experimentally revealed in the tension deformation of a natural layered ceramic. This effect can increase the volume strain energy per unit volume by 1100% and, simultaneously, decrease the deformation strain energy per unit volume by about 44%, so that it effectively enhances the deformation capacity by about 1 order of magnitude in the tension of the material. The present study also shows that the physical mechanisms producing the effect are attributed to the climbing on one another of the nanostructures in the natural material, which provides a guide to the design of synthetic toughening composites.