20.500.12556/DKUM-87763 Introducing auxetic behavior to syntactic foams This paper proposes an innovative multi-material approach for introducing auxetic behaviour to syntactic foams (SFs). By carefully designing the size, shape, and orientation of the SFs, auxetic deformation behaviour was induced. Re-entrant hexagon-shaped SF elements were fabricated using expanded perlite (EP) particles and a plaster of Paris slurry first. Then, an auxetic pattern of these SF elements was arranged within a stainless-steel casting box. The empty spaces between the SF elements were filled with molten aluminium alloy (A356) using the counter-gravity infiltration casting technique. The cast auxetic composite had a bulk density of 1.52 g/cm3. The cast composite was then compressed under quasi-static loading to characterise its deformation behaviour and to determine the mechanical properties, especially the Poisson’s ratio. The cast composite deformation was auxetic with a Poisson’s ratio of −1.04. Finite Element (FE) simulations were conducted to understand the deformation mechanism better and provide means for further optimisation of the geometry. auxetic cellular structure syntactic foams experimental tests mechanical properties Poisson’s ratio avksetične celične strukture sintaktične pene eksperimentalni testi mehanske lastnosti true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/metals © 2024 by the authors Članek v reviji 2024-03-28 10:44:18 2024-03-28 10:44:19 2025-07-29 14:40:52 0000-00-00 00:00:00 2020 0 0 12 str. iss. 4, [article no.] 387 Vol. 14 March 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-02-21 2024-03-25 2024-03-26 539.2:620.1 190687491 10.3390/met14040387 2075-4701 metals-14-00387-v2.pdf metals-14-00387-v2.pdf 1 CC1E174DEA2C34620E70E9E6F3029E98 71b64a478e68ac15ce9f544a6265c68083d6cc3aa5c5ea0f848f4460f638dcbf d2ffee99-ece7-11ee-9311-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=177502 https://www.mdpi.com/2075-4701/14/4/387 0 e55aee6a-ece7-11ee-9311-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=177503 Fakulteta za strojništvo 0 0 0