期刊
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
卷 30, 期 2, 页码 262-271出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15376494.2021.2012616
关键词
Large deformations; auxetic honeycomb; auxetic mechanism; mechanical properties; numerical simulations; mechanical testing
The deformation behavior of intersecting ligaments forming variants of the square and rectangular grids under mechanical compression was investigated. It was shown that these systems can exhibit a negative incremental Poisson's ratio at relatively large axial compressive strains. The extent of auxeticity depends on the relative offset of successive ligaments, the relative lengths of the ligaments as well as on their thickness. Two distinct modes of deformation were observed, one resembling that of the reentrant hexagonal honeycomb and the other that of the meta-tetrachiral system.
The deformation behavior of intersecting ligaments forming variants of the square and rectangular grids under mechanical compression was investigated. It was shown that such systems are able to exhibit a negative incremental Poisson's ratio at relatively large axial compressive strains. Numerical simulations and experimental studies indicated that the extent of auxeticity depends on the relative offset of successive ligaments, the relative lengths of the ligaments as well as on their thickness. It was also shown that there are two distinct modes of deformation, one resembling that of the reentrant hexagonal honeycomb and the other that of the meta-tetrachiral system.
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