ON THE MICROSTRUCTURE OF SURFACE EFFECTS AND RELATED INSTABILITIES

FRANTZISKONIS, G; VARDOULAKIS, I

dc.contributor.author	FRANTZISKONIS, G	en
dc.contributor.author	VARDOULAKIS, I	en
dc.date.accessioned	2014-03-01T01:41:30Z
dc.date.available	2014-03-01T01:41:30Z
dc.date.issued	1992	en
dc.identifier.issn	0997-7538	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23504
dc.subject.classification	Mechanics	en
dc.subject.other	BIFURCATION	en
dc.subject.other	TENSION	en
dc.subject.other	DAMAGE	en
dc.title	ON THE MICROSTRUCTURE OF SURFACE EFFECTS AND RELATED INSTABILITIES	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1992	en
heal.abstract	Based on Mindlin's theory for material micro-structure interesting surface effects under conditions of equilibrium are studied in this paper. The governing field equations for uniaxial plane deformations are established; surface instability analysis shows non uniform deformations for a layer of specified distance from the surface. Experimental as well as fracture mechanics based considerations show that this surface-layer is extremely thin for metals while for brittle materials its magnitude is of the order of 1 cm. Material microstructure introduces a singular perturbation to the original Hill and Hutchinson problem; here we introduce a single perturbation parameter and we obtain a "dispersion" law for the surface buckling load. It is found that surface degradation and skin effects can be attributed to localized surface buckling instabilities. Experimental information on skin effects can provide an estimation of the internal material length.	en
heal.publisher	GAUTHIER-VILLARS	en
heal.journalName	EUROPEAN JOURNAL OF MECHANICS A-SOLIDS	en
dc.identifier.isi	ISI:A1992HF10700002	en
dc.identifier.volume	11	en
dc.identifier.issue	1	en
dc.identifier.spage	21	en
dc.identifier.epage	34	en