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Smart Cellular Systems with Pressure Dependent Poisson’s Ratios

Attard D., Cauchi R., Gatt R., Grima-Cornish J. N., Grima J. N.

Computational Methods in Science and Technology

2020

Vol. 26, No. 2

37--45

The Poisson’s ratio behaviour of cellular systems which change their internal features when subjected to pressure change to become a “re-entrant” or “non-re-entrant” honeycomb was investigated. It was shown, through finite elements simulations, that these changes in geometry permit the systems to exhibit a wide range of Poisson’s ratios, the magnitude and sign of which can be controlled through the external pressure. Auxetic behaviour was also shown to be obtainable at specific pressures with the right combination of design and materials.