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The effects of moisture on the mechanical properties of the spicules of the sponge Euplectella aspergillum have been investigated. Determinations were made with the aid of a dynamic mechanical analyzer in both the static and dynamic modes, as well as imaging of the failed surfaces with scanning electron microscopy. For comparison purposes, melt-grown glass fibers of similar diameters were also studied...
The effects of loading rate variations on the stress–strain behavior, failure mechanisms, fracture modes, and energy-dissipating capability of the spicules of the sponge Euplectella aspergillum have been investigated. Comparisons were made with similar measurements on a silicate glass. It was concluded that the very thin (5–10nm) organic layers that are interspersed with thicker layers of hydrated...
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