Dynamic crack propagation in composites

Theocaris, PS; Milios, J

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Milios, J	en
dc.date.accessioned	2014-03-01T01:05:49Z
dc.date.available	2014-03-01T01:05:49Z
dc.date.issued	1980	en
dc.identifier.issn	03769429	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9010
dc.subject	Crack Propagation	en
dc.subject	Epoxy Resin	en
dc.subject	High Speed	en
dc.subject.other	FRACTURE MECHANICS	en
dc.title	Dynamic crack propagation in composites	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF00042384	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF00042384	en
heal.publicationDate	1980	en
heal.abstract	A study of the behaviour of cracked composite specimens under dynamic tensile load was undertaken. The crack propagation in the two-phase epoxy resin specimens was studied by the method of high speed photography along with the optical method of caustics. Our investigation was concentrated both on the dependence of the maximum crack propagation velocity and the stress intensity factor at the crack tip upon the different material combinations of the composite, as well as on the role of the interface again in regard to the crack propagation and the singular stress field concentrations at the crack tip. The results show that, under a given value of the applied dynamic load and given notch dimensions, the stress intensity factor at the crack tip and the crack propagation velocity in each phase of the composite is highly dependent on the material characteristics of each phase and on the existence of a stable interface between the two phases. More concretely, it was proved that the interface plays the role of a ""barrier"" to the crack propagation. Indeed, the crack propagates with a certain maximum velocity in the first phase of the composite and then stops momentarily when it reaches the interface, thus attaining later in the second phase a new maximum velocity. The maximum velocity and the stress intensity factor in the second phase of the composite specimens strongly depend on the material characteristics of the first (notched) phase and are also highly influenced by the crack arrest process itself. The crack propagation and the stress field concentrations at the crack tip in the first phase of the composite specimens is mainly independent from the material characteristics of the second phase of the composite specimens. © 1980 Sijthoff & Noordhoff International Publishers.	en
heal.publisher	Kluwer Academic Publishers	en
heal.journalName	International Journal of Fracture	en
dc.identifier.doi	10.1007/BF00042384	en
dc.identifier.volume	16	en
dc.identifier.issue	1	en
dc.identifier.spage	31	en
dc.identifier.epage	51	en