Journal
ENGINEERING FRACTURE MECHANICS
Volume 129, Issue -, Pages 54-66Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2013.12.006
Keywords
Polyurethane foam; Fracture toughness; Density; Size effect; Cell orientation
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Funding
- European Union Seventh Framework Programme (FP7) [FP7 - REGPOT - 2009 - 1, 245479]
- Technische Universitat Dresden
- [PN-II-ID-PCE-2011-3-0456]
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Many efforts have been made in recent years to determine the fracture toughness of different types of foams in static and dynamic loading conditions. Taking into account that there is no standard method for the experimental determination of the fracture toughness of plastic foams different procedures and specimens were used. This paper presents the polyurethane foam fracture toughness results obtained for different foam densities. Two types of specimens were used for determining fracture toughness in modes I, II and a mixed one, and also the size effect, loading speed and loading direction were investigated. The paper proposed correlations for density, cell orientation and mixed mode loading based on the experimental testing results. (C) 2013 Elsevier Ltd. All rights reserved.
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