Lookup NU author(s): Dr Nicholas Aldred,
Professor Tony Clare
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Dynamic mechanical analysis was used to record the behaviour of hydrated and dehydrated byssal threads under tensile stress and during dynamic thermal cycling. Fresh byssi, and byssi aged two weeks prior to testing, were used to further study the effects of age on the mechanical properties of this material. It was found that while older threads demonstrated increased stiffness, age did not necessarily affect their ultimate tensile strength. Dehydration had a more pronounced effect on thread stiffness and also increased the ultimate strength of the material. In their dry state, byssal threads displayed multiple yield points under tension and these, it is suggested, could equate to different phases within the bulk of the material. Dynamic analysis revealed glass transition (T-g) and ecologically relevant operational temperatures for byssi, where their modulus (E-1) remained constant. These discoveries are related to the ecological function of byssal threads and to the emerging yield of biomimetics.
Author(s): Aldred N, Wills T, Williams DN, Clare AS
Publication type: Article
Publication status: Published
Journal: Journal of the Royal Society: Interface
ISSN (print): 1742-5689
ISSN (electronic): 1742-5662
Publisher: The Royal Society Publishing
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