Characterization of fracture toughness (G c) of PVC and PES foams

Autor:	Anette M. Karlsson, Elio E. Saenz, Leif A. Carlsson
Rok vydání:	2011
Předmět:	Toughness Materials science Mechanical Engineering Linear elasticity Polyvinyl chloride chemistry.chemical_compound Brittleness Fracture toughness chemistry Mechanics of Materials Solid mechanics Fracture (geology) General Materials Science Composite material Ductility
Zdroj:	Journal of Materials Science. 46:3207-3215
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-010-5205-x
Popis:	The fracture behavior of polyvinyl chloride (PVC) and polyethersulfone (PES) foams has been examined using the single-edge notch bend and the double cantilever beam (DCB) tests. PVC foam densities ranging from 45 to 100 kg/m3 and PES foam densities ranging from 60 to 130 kg/m3 were examined. The PVC foams failed in a linear elastic brittle manner, whereas the PES foams displayed much more ductility and substantially larger toughness at a comparable foam density. The cell wall thickness of the PES foams was almost twice the thickness of the PVC foams which may have contributed to the high fracture toughness here defined as critical energy release rate (Gc). The PES foam, further displayed low initiation toughness, due to the sharp artificial crack tip and large toughness corresponding to propagation from a natural crack. The results show that the ductile PES foams have toughness close to its solid counterpart whereas the toughness of the PVC foams falls substantially below its solid counterpart.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c53b41727f1de4451d518123a495c6ae https://doi.org/10.1007/s10853-010-5205-x Zobrazit plný text záznamu Plný text ve formátu PDF