Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer

Abstract The development of new materials with reduced noise and vibration levels is an active area of research due to concerns in various aspects of environmental noise pollution and its effects on health. Excessive vibrations also reduce the service live of the structures and limit the fields of t...

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Autores principales:	A. P. Unwin, P. J. Hine, I. M. Ward, M. Fujita, E. Tanaka, A. A. Gusev
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ee0c039823d0423ab673dc210e786979
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spelling	oai:doaj.org-article:ee0c039823d0423ab673dc210e7869792021-12-02T15:08:28ZEscaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer10.1038/s41598-018-20670-02045-2322https://doaj.org/article/ee0c039823d0423ab673dc210e7869792018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-20670-0https://doaj.org/toc/2045-2322Abstract The development of new materials with reduced noise and vibration levels is an active area of research due to concerns in various aspects of environmental noise pollution and its effects on health. Excessive vibrations also reduce the service live of the structures and limit the fields of their utilization. In oscillations, the viscoelastic moduli of a material are complex and it is their loss part – the product of the stiffness part and loss tangent – that is commonly viewed as a figure of merit in noise and vibration damping applications. The stiffness modulus and loss tangent are usually mutually exclusive properties so it is a technological challenge to develop materials that simultaneously combine high stiffness and high loss. Here we achieve this rare balance of properties by filling a solid polymer matrix with rigid inorganic spheres coated by a sub-micron layer of a viscoelastic material with a high level of internal friction. We demonstrate that this combination can be experimentally realised and that the analytically predicted behaviour is closely reproduced, thereby escaping the often termed ‘Ashby’ limit for mechanical stiffness/damping trade-off and offering a new route for manufacturing advanced composite structures with markedly reduced noise and vibration levels.A. P. UnwinP. J. HineI. M. WardM. FujitaE. TanakaA. A. GusevNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. P. Unwin P. J. Hine I. M. Ward M. Fujita E. Tanaka A. A. Gusev Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
description	Abstract The development of new materials with reduced noise and vibration levels is an active area of research due to concerns in various aspects of environmental noise pollution and its effects on health. Excessive vibrations also reduce the service live of the structures and limit the fields of their utilization. In oscillations, the viscoelastic moduli of a material are complex and it is their loss part – the product of the stiffness part and loss tangent – that is commonly viewed as a figure of merit in noise and vibration damping applications. The stiffness modulus and loss tangent are usually mutually exclusive properties so it is a technological challenge to develop materials that simultaneously combine high stiffness and high loss. Here we achieve this rare balance of properties by filling a solid polymer matrix with rigid inorganic spheres coated by a sub-micron layer of a viscoelastic material with a high level of internal friction. We demonstrate that this combination can be experimentally realised and that the analytically predicted behaviour is closely reproduced, thereby escaping the often termed ‘Ashby’ limit for mechanical stiffness/damping trade-off and offering a new route for manufacturing advanced composite structures with markedly reduced noise and vibration levels.
format	article
author	A. P. Unwin P. J. Hine I. M. Ward M. Fujita E. Tanaka A. A. Gusev
author_facet	A. P. Unwin P. J. Hine I. M. Ward M. Fujita E. Tanaka A. A. Gusev
author_sort	A. P. Unwin
title	Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
title_short	Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
title_full	Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
title_fullStr	Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
title_full_unstemmed	Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
title_sort	escaping the ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/ee0c039823d0423ab673dc210e786979
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Escaping the Ashby limit for mechanical damping/stiffness trade-off using a constrained high internal friction interfacial layer

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