학술논문
Synergies of material and geometrical non-linearities allow for the tuning of damping properties of functionally graded composite materials.
Document Type
Article
Author
Source
Subject
*COMPOSITE materials
*FUNCTIONALLY gradient materials
*EPOXY resins
*NICKEL-titanium alloys
*FIBERS
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Language
ISSN
0022-2461
Abstract
In this study, we present an alternative fabrication technique to obtain functionally graded polymer–metal composites. The aim is to obtain a composite material with a graded damping factor, which is provided by the presence of pseudoelastic nickel–titanium (NiTi) fibres within an epoxy resin matrix. A preliminary dynamic mechanical characterisation of the NiTi wire revealed a pre-strain dependency of its damping factor. By fabricating wires with curved geometries in the free state, we were able to obtain fibres with a graded level of pre-strain when straightened. This feature in turn imparts a graded damping response. When encapsulating the straightened fibres in an epoxy resin, the graded damping response is transferred to the composite. [ABSTRACT FROM AUTHOR]