Fatigue crack propagation in polyvinylchloride and polyethersulfone polymer foams

Autor:	Anette M. Karlsson, Elio E. Saenz, Leif A. Carlsson, Gary C Salivar
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Strain energy release rate Thermoplastic Materials science Mechanical Engineering Fracture mechanics Polymer Edge (geometry) Paris' law Fatigue crack propagation chemistry Mechanics of Materials Ceramics and Composites Growth rate Composite material
Zdroj:	Journal of Sandwich Structures & Materials. 16:42-65
ISSN:	1530-7972 1099-6362
DOI:	10.1177/1099636213505304
Popis:	Crack growth in cross-linked polyvinylchloride and thermoplastic polyethersulfone foams under mode [Formula: see text] fatigue cycling has been experimentally examined. Polyvinylchloride foams of densities ranging from 45 to 100 kg/m3 and polyethersulfone foams of densities ranging from 60 to 130 kg/m3 were considered. All cyclic tests employed the sandwich double cantilever beam test specimen. The test results revealed that crack growth rate (da/dN) compared at a constant cyclic energy release rate (ΔG) decreased with increasing density of the foam. The crack propagation rates in low-density polyethersulfone foams were much less than in polyvinylchloride foams of similar density. The crack growth rate in the high-density polyethersulfone foam was highly dependent on the loading R-ratio. The crack front in the low-density polyethersulfone foam displayed marked deviations from a straight shape, where the edge regions propagated faster than the center of the specimen. All polyvinylchloride foams and high-density polyethersulfone foam displayed straight crack fronts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c028be7ba14398d1009b40c943eca98e https://doi.org/10.1177/1099636213505304 Zobrazit plný text záznamu