The distortion of the shape of reflected caustics in birefringent materials

Theocaris, PS

dc.contributor.author	Theocaris, PS	en
dc.date.accessioned	2014-03-01T01:08:34Z
dc.date.available	2014-03-01T01:08:34Z
dc.date.issued	1991	en
dc.identifier.issn	0013-7944	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10580
dc.subject.classification	Mechanics	en
dc.subject.other	Plates--Stresses	en
dc.subject.other	Birefringent Material Reflections	en
dc.subject.other	Crack Tip Stresses	en
dc.subject.other	Muskhlishvili Potential Functions	en
dc.subject.other	Optical Anisotropy	en
dc.subject.other	Reflected Caustics	en
dc.subject.other	Materials	en
dc.title	The distortion of the shape of reflected caustics in birefringent materials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0013-7944(91)90023-T	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0013-7944(91)90023-T	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	The caustics formed from reflections from the rear faces of birefringent materials were shown to be twinned because of the optical anisotropy of the reflecting plates. An improved method for evaluating the stress intensity factor in the neighbourhood of a crack tip is developed, considering the first two terms of both complex Muskhelishvili potential functions describing stress fields in birefringent materials and their particular interrelations due to anisotropy. This approximation gives an accurate definition of the geminated caustics engendered by the refraction of the light rays from initial curves in the neighbourhood of the crack tip. It was shown that as the amount of anisotropy is increased the shapes of the initial curves cease to remain quasi-circular whereas the respective caustics are doubled and distorted. © 1991.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Engineering Fracture Mechanics	en
dc.identifier.doi	10.1016/0013-7944(91)90023-T	en
dc.identifier.isi	ISI:A1991FL80200006	en
dc.identifier.volume	39	en
dc.identifier.issue	1	en
dc.identifier.spage	71	en
dc.identifier.epage	81	en