Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 256, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201800186
Keywords
3D printing; auxetics; deformation mechanisms; finite element simulation; mechanical testing; missing rib model square grid
Categories
Funding
- European Regional Development Fund [ERDF-080]
- University of Malta
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An extensive investigation is carried out on the missing rib square grid structure using finite element simulations. This showed that, in the cases considered in this study, the type of deformation is primarily dependent on the ratio of the thickness of different ribs with the structure behaving like an anti-tetrachiral at particular ratios. The analysis also showed that the ability of the structure to deform predominantly through the bending of the ligament allows it to achieve much more negative values of the Poisson's ratio than previously reported. Confirmation of the numerical results is obtained through experimental methods involving the 3D printing of representative structures which are subsequently subjected to compression.
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