Effective Mechanical Responses of a Class of 2D Chiral Materials

Yun Che Wang, Tsai Wen Ko, Xuejun Ren

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Chiral materials may exhibit negative Poisson's ratio and deformation-mode coupling phenomena. The finite element numerical method is adopted to analyze a class of 2D chiral and nonchiral materials and to show the effects of microstructural geometry on their effective elastic properties and coupling between tension/compression and bending. With the same area fraction (AF), nonchiral samples show larger effective moduli than chiral ones. The number of unit cells may reduce negativity in effective Poisson's ratio of the chiral samples due to nonuniform lateral deformation under uniaxial straining. Increasing AF in a hierarchical pattern in the chiral samples makes their Poisson's ratio more negative. Bending occurs in the chiral samples when they are under uniform, uniaxial, tensile, or compressive straining due to the coupling of deformation modes. The sensibility of tension–bending coupling may be controlled by the chiral microstructure. Optimization of the coupling sensitivity may help develop novel mechanical sensors.

原文English
文章編號2000277
期刊Physica Status Solidi (B) Basic Research
257
發行號10
DOIs
出版狀態Published - 2020 十月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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