Crack bifurcation modes in composite plates under impact

Theocaris, PS; Demakos, CB

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Demakos, CB	en
dc.date.accessioned	2014-03-01T01:06:33Z
dc.date.available	2014-03-01T01:06:33Z
dc.date.issued	1986	en
dc.identifier.issn	0376-9429	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9471
dc.subject.classification	Mechanics	en
dc.subject.other	COMPOSITE MATERIALS - Crack Propagation	en
dc.subject.other	MATERIALS TESTING - Impact	en
dc.subject.other	ELASTIC-STRAIN ENERGY	en
dc.subject.other	PARTICULATE INCLUSIONS	en
dc.subject.other	REINFORCED PLATES	en
dc.subject.other	PLATES	en
dc.title	Crack bifurcation modes in composite plates under impact	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF00019785	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF00019785	en
heal.language	English	en
heal.publicationDate	1986	en
heal.abstract	Cracked plates with bonded elastic circular inclusions inside a matrix were subjected to an impact tensile loading. The influence of the inclusion on the propagation of an initial edge-crack was discussed in this paper. Two types of specimens were tested, that is with hard or soft inclusions surrounded by soft or hard matrices respectively. It has been shown that bi-, or tri-furcations of the propagating crack have persistently occured at the region of mesophase between matrix and circular inclusions. The phenomenon of splitting of the initial crack was common in both types of specimens. For the definition of the prevailing stress field, the dynamic stress intensity factors were evaluated at different positions of the crack, as well as the crack-velocities along the main crack or its branches during their propagation. It was observed that the crack initiation in soft plates with hard inclusions was followed by the emission of Rayleigh waves, which contributed to the mode of fracture of the composite. Isochromatic patterns were also used to simulate the stress-field of the propagating cracks against the inclusions at distinct time-instants where the propagating crack was frozen at this instant and static photoelastic analysis was applied. These approximations gave satisfactory results with the cracks advancing inside the composite plates. © 1986 Martinus Nijhoff Publishers.	en
heal.publisher	Kluwer Academic Publishers	en
heal.journalName	International Journal of Fracture	en
dc.identifier.doi	10.1007/BF00019785	en
dc.identifier.isi	ISI:A1986F606000001	en
dc.identifier.volume	32	en
dc.identifier.issue	2	en
dc.identifier.spage	71	en
dc.identifier.epage	92	en