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Investigation of a Novel Chiral S‐Shaped Auxetic Structure under Large Tensile Deformation
Author(s) -
Meena Kusum,
Singamneni Sarat
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202000239
Subject(s) - auxetics , ultimate tensile strength , materials science , tensile testing , deformation (meteorology) , poisson's ratio , composite material , selective laser melting , poisson distribution , tensile strain , universal testing machine , mathematics , microstructure , statistics
The behavior of the chiral S‐shaped structure subjected to large tensile loads in both X and Y directions is reported herein. The physical samples of stainless steel 316L are fabricated by the selective laser melting technique and experimental tests are conducted on a universal tensile testing machine. The results of tensile tests in the form of deformation patterns, tensile stress–strain curves, and Poisson's ratios are shown pictorially and graphically. The orientation of the S‐shaped structure with X ‐direction loading is found to exhibit higher auxeticity over the large range of tensile loading. Nonetheless, the structure is also found auxetic when loaded from Y ‐direction albeit the values of negative Poisson's ratios are not as high as of the X ‐directional loading.