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Analysis of antichiral thermomechanical metamaterials with continuous negative thermal expansion properties

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journal contribution
posted on 24.06.2021, 15:22 by D Saha, P Glanville, Eduard KarpovEduard Karpov
Negative thermal expansion is an interesting and appealing phenomenon for various scientific and engineering applications, while rarely occurring in natural materials. Here, using a universal antichiral metamaterial model with bimetal beams or strips, a generic theory has been developed to predict magnitude of the negative thermal expansion effect from model parameters. Thermal expansivity of the metamaterial is written as an explicit function of temperature and only three design parameters: relative node size, chirality angle, and a bimetal constant. Experimental measurements follow theoretical predictions well, where thermal expansivity in the range of negative 0.0006-0.0041 °C has been seen. -1

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Citation

Saha, D., Glanville, P.Karpov, E. G. (2020). Analysis of antichiral thermomechanical metamaterials with continuous negative thermal expansion properties. Materials, 13(9), 2139-. https://doi.org/10.3390/ma13092139

Publisher

MDPI AG

Language

en

issn

1996-1944