A comparison between dynamic and static fracture toughness of polyurethane foams

作者：Marsavina Liviu^*; Linul Emanoil; Voiconi Tudor; Sadowski Tomasz

来源：Polymer Testing, 2013, 32(4): 673-680.

DOI：10.1016/j.polymertesting.2013.03.013

• Polyurethane foam
• Static fracture toughness
• Dynamic fracture toughness

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.

• 出版日期2013-6