Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 251, Issue 2, Pages 307-313Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201384249
Keywords
auxetic; foams; impact properties
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This paper reports an experimental investigation on the effect of auxeticity towards impact loads. Both conventional and auxetic polyurethane (PU) foams were subjected to impact drop tests, and the damaged surfaces were visually inspected. Although it is known that auxetic materials resist indentation due to densification along the load line, experimental impact tests on conventional and auxetic PU foams reveal that auxetic foams are not necessarily advantageous over conventional ones for very high impact. This paper proposes a geometrical model that resembles the microstructure of auxetic foams, as well as elucidates both the auxetic behavior and the limiting strength at high impact. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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