Negative Poisson's ratio in cubic materials along principal directions

作者：Ho Duc Tam; Park Soon Dong; Kwon Soon Yong; Han Tong Seok; Kim Sung Youb^*

来源：Physica Status Solidi (B) Basic Research, 2016, 253(7): 1288-1294.

DOI：10.1002/pssb.201600017

• atomic simulation
• cubic material
• density functional theory
• DFT simulation
• negative Poisson's ratio

This report employed molecular statics simulation and density-functional-theory calculation to study the Poisson's ratios of face-centered-cubic materials. We provide numerical and theoretical evidences to show that cubic materials can exhibit auxetic behavior in a principal direction under proper loading conditions. When a stress perpendicular to the loading direction is applied, cubic materials can exhibit a negative Poisson's ratio at finite strain. The negative Poisson's ratio behavior, including its direction and value, is highly dependent on the direction and magnitude of the transversely applied stresses. As a result, we show that it is possible to tune the direction and magnitude of the negative Poisson's ratio behavior of cubic materials by controlling the transverse loadings.

• 出版日期2016-7