Brittle curving and branching under high dynamic loading

Theocaris, PS; Andrianopoulos, NP; Kourkoulis, SK

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Andrianopoulos, NP	en
dc.contributor.author	Kourkoulis, SK	en
dc.date.accessioned	2014-03-01T01:08:16Z
dc.date.available	2014-03-01T01:08:16Z
dc.date.issued	1991	en
dc.identifier.issn	0308-0161	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10382
dc.subject	Dynamic Loading	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Fracture Mechanics	en
dc.subject.other	Plates--Fracture	en
dc.subject.other	Brittle Curving	en
dc.subject.other	Crack Curving	en
dc.subject.other	Dynamic Loading	en
dc.subject.other	Plexiglass	en
dc.subject.other	Stress Intensity Factors	en
dc.subject.other	Polymethyl Methacrylates	en
dc.title	Brittle curving and branching under high dynamic loading	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0308-0161(91)90013-R	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0308-0161(91)90013-R	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	Crack curving, combined eventually with crack branching, phenomena in thin centrally-cracked plexiglas plates under tensile, high dynamic loadings were described. Affinities between crack curving and crack branching were studied at high-loading speeds, where crack curving is intimately related with crack branching. The large scattering and deviations between the values of the branching angles derived from the tests and those obtained by applying the classical macroscopic fracture criteria suggest a modification of these criteria to appropriately describe crack curving and branching phenomena. Such a modification of the fracture creteria should give better results especially when they could be applied to small-angle star-shaped geometries of two cracks emerging from the main crack. In such geometries the two cracks are either repelling each other, when their tips are closely spaced, or they are mutually attracted, when their tips are at larger distances. Hence, the branching angle must be at the equilibrium point between repelling and attracting forces of the two neighbouring crack tips. This model yields a value of the branching angle which is equal to the half value predicted by current fracture criteria applied in their initial form. Extensive experimental evidence agrees in general with these results. © 1991.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	International Journal of Pressure Vessels and Piping	en
dc.identifier.doi	10.1016/0308-0161(91)90013-R	en
dc.identifier.isi	ISI:A1991FT55600003	en
dc.identifier.volume	46	en
dc.identifier.issue	2	en
dc.identifier.spage	149	en
dc.identifier.epage	166	en