@inbook{eb8302e81d38411ab0c67a0eec65d961,
title = "Experimental characterization of thermomechanically induced instability in polymer foam cored sandwich structures",
abstract = "This paper presents a primarily experimental investigation of the instability behaviour of polymer foam cored sandwich structures loaded at elevated temperatures. An experimental setup was designed to induce the unstable behaviour using sandwich beam specimens subjected to four-point bending and by imposing a linear temperature gradient through the core thickness. A wavy deformation of the face-sheet was observed using high-speed imaging combined with digital image correlation (DIC) for the specimens tested at elevated temperatures over 70°C, thus identifying the occurrence of face-sheet wrinkling. The face-sheet wavy deformation evolves to core crushing in tens of microseconds and thereby the high-speed imaging is essential in this work. The experimental results shows that the failure mode of the specific polymer foam cored sandwich beam specimens shifts from face-sheet yielding to face-sheet wrinkling as the temperature increases, and this is shown to agree well with analytical and numerical predictions.",
author = "S. Zhang and Dulieu-Barton, {J. M.} and Thomsen, {O. T.}",
year = "2014",
doi = "10.1007/978-3-319-00873-8_13",
language = "English",
isbn = "978-3-319-00872-1",
volume = "6",
series = "Conference Proceedings of the Society for Experimental Mechanics Series",
pages = "103--108",
editor = "Tandon, {G P} and Tekalur, {Srinivasan Arjun} and Carter Ralph and Sottos, {Nancy R} and {Blaiszik }, Benjamin",
booktitle = "Experimental Mechanics of Composite, Hybrid, and Multifunctional Materials",
publisher = "Springer Publishing Company",
address = "United States",
}