| Title: | Introducing auxetic behavior to syntactic foams |
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| Authors: | ID Novak, Nejc (Author)
ID Kolar, Miha (Author)
ID Movahedi, Nima (Author)
ID Vesenjak, Matej (Author)
ID Ren, Zoran (Author)
ID Fiedler, Thomas (Author) |
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| Files: |  metals-14-00387-v2.pdf (8,46 MB)
MD5: CC1E174DEA2C34620E70E9E6F3029E98
 https://www.mdpi.com/2075-4701/14/4/387
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | 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. |
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| Keywords: | auxetic cellular structure, syntactic foams, experimental tests, mechanical properties, Poisson’s ratio |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 21.03.2024 |
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| Article acceptance date: | 25.03.2024 |
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| Publication date: | 26.03.2024 |
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| Publisher: | MDPI |
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| Year of publishing: | 2020 |
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| Number of pages: | 12 str. |
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| Numbering: | Vol. 14, iss. 4, [article no.] 387 |
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| PID: | 20.500.12556/DKUM-87763  |
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| UDC: | 539.2:620.1 |
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| ISSN on article: | 2075-4701 |
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| COBISS.SI-ID: | 190687491 |
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| DOI: | 10.3390/met14040387 |
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| Publication date in DKUM: | 28.03.2024 |
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| Views: | 222 |
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| Downloads: | 24 |
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| Metadata: |    |
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| Categories: | Misc.
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