Effects of hot-wet storage aging, CNT-integration and damping layer interposition on static and fatigue interlaminar shear response of a UD Graphite/Epoxy material system

<p>The present work aims at experimental quantification of the effect of hot-wet storage aging on the static and<br> fatigue interlaminar shear response of three UD Graphite-Epoxy based material systems: a control laminate, a<br> CNT-treated laminate and a lamination including an embedded damping veil. In this context, specimens have<br> been fabricated and tested for determination of the interlaminar shear strength (ILSS) according to the relevant<br> ASTM standard, and the effects of the above mentioned constituents on the response of non-aged (RT) and aged<br> (HW) specimens have been investigated. The experimental data, presented in batch mode, indicated that aging<br> leads to severe degradation of the interlaminar shear strength and relevant fatigue endurance of all material<br> systems, whereas the CNT-treated laminate appeared to be the most sensitive configuration. In the case of nonaged specimens, CNT-treatment led to larger failure strains and a clear bilinear response, while all three material<br> systems exhibited similar values of interlaminar shear strength.</p>