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Marsavina, Liviu; Linul, Emanoil; Voiconi, Tudor; Sadowski, Tomasz
Polymer testing, 06/2013, Letnik: 32, Številka: 4Journal Article
The paper presents a correlation between dynamic and static fracture toughness of polyurethane rigid foams. Static three point bend tests and instrumented impact tests were performed using single edge notch specimens. The obtained results show that for all foam densities the dynamic fracture toughness is higher than the static toughness. Density appears to have the main influence on both static and dynamic fracture toughness. A quasi brittle fracture without plastic deformations and cushioning was observed for all foam densities.
