Study on mechanical properties of the negative Poisson ratio honeycomb prepared by the equibiaxial compression method
LI Yuwei
SU Buyun
QIU Ji
SHU Xuefeng
LI Zhiqiang
Abstract：Negative Poisson ratio materials are widely used in various fields because of their unique properties of expansion in tension and contraction in compression.A honeycomb material with negative Poisson ratio was obtained by equal biaxial compression of the two-dimensional Voronoi model,and the effects of different compression ratios on their static tensile/compressive mechanical properties were studied by numerical simulation.The results show that the tensile and compressive stress-strain curves of the two-dimensional negative Poisson ratio honeycomb prepared by the above methods have typical"three-stage"deformation characteristics of porous materials,and show significant tensile and compressive strength asymmetry.Under uniaxial tension,the material shows the obvious negative Poisson ratio phenomenon.With the increase of the compression ratio,the modulus of elasticity and elastic Poisson ratio gradually decrease,and the yield strength and platform stress gradually increase.With the gradual increase of the tensile strain,the plastic Poisson ratio of the material changes from negative to zero and then to positive.However,due to the mutual contact between the inner edges of the material,the inward deformation of the material is limited.Therefore,the material exhibits positive Poisson ratio behavior under uniaxial compression,and its modulus of elasticity,yield strength,elastic/plastic Poisson ratio and platform stress increase with the increase of the compression ratio.In addition,the negative Poisson ratio material is anisotropic in the tension and isotropic in the compression.
Keywords：Negative Poisson ratio honeycombDeformation modeElastic/plastic Poisson ratioPlateau stressTension-compression asymmetry
Publication Date：2025-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 127-134 )