@inproceedings{93b2ee5c78334e869777cfb8ab74f171,
title = "Impact response of density graded cellular polymers",
abstract = "Full-field deformation response of density-graded cellular polymers subjected to high velocity impact is investigated experimentally. Recently developed experimental setup consisting of ultra-high speed imaging in conjunction with digital image correlation is used to measure in-situ full-field deformation on density-graded polymeric foam specimens. Loading of the specimens is performed using a direct impact configuration in a modified Hopkinson bar apparatus. Discretely-layered foam specimens made from three distinct layers each with a different bulk density are subjected to direct impact, while their deformation response is studied via ultra-high speed digital image correlation. Formation and propagation of compaction waves from the impact side to the support end of the specimen are observed and analyzed. Spatial distribution of inertia stress is determined from acceleration fields and density of the layers. Full-field stress distribution in the specimen is later used to estimate the stress gradients within compaction waves. Mechanisms associated with the energy dissipation in graded foam specimens are discussed.",
author = "Behrad Koohbor and Suraj Ravindran and Addis Kidane",
note = "Publisher Copyright: {\textcopyright} 2018, The Society for Experimental Mechanics, Inc.; Annual Conference and Exposition on Experimental and Applied Mechanics, 2017 ; Conference date: 12-06-2017 Through 15-06-2017",
year = "2018",
doi = "10.1007/978-3-319-62956-8_4",
language = "English (US)",
isbn = "9783319629551",
series = "Conference Proceedings of the Society for Experimental Mechanics Series",
publisher = "Springer New York LLC",
pages = "17--23",
editor = "Leslie Lamberson and Steven Mates and Jamie Kimberley",
booktitle = "Dynamic Behavior of Materials - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics",
}