Experimental investigation of strain concentrations caused by inserts in sandwich beams

Tsouvalis, NG; Kollarini, MJ

dc.contributor.author	Tsouvalis, NG	en
dc.contributor.author	Kollarini, MJ	en
dc.date.accessioned	2014-03-01T01:28:22Z
dc.date.available	2014-03-01T01:28:22Z
dc.date.issued	2008	en
dc.identifier.issn	0039-2103	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18823
dc.subject	Composite	en
dc.subject	Insert	en
dc.subject	Sandwich	en
dc.subject	Strain concentrations	en
dc.subject	Vacuum infusion	en
dc.subject.classification	Materials Science, Characterization & Testing	en
dc.subject.other	Bending (deformation)	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Foams	en
dc.subject.other	Joints (structural components)	en
dc.subject.other	Offshore oil well production	en
dc.subject.other	Sandwich structures	en
dc.subject.other	Skin	en
dc.subject.other	Strain measurement	en
dc.subject.other	Vacuum applications	en
dc.subject.other	A plane	en
dc.subject.other	Composite skins	en
dc.subject.other	Core junctions	en
dc.subject.other	Experimental investigations	en
dc.subject.other	Experimental studies	en
dc.subject.other	Glass/polyester	en
dc.subject.other	Linear bending	en
dc.subject.other	Material characterizations	en
dc.subject.other	Sand wich beams	en
dc.subject.other	Strain concentration factors	en
dc.subject.other	Strain concentrations	en
dc.subject.other	Transverse strains	en
dc.subject.other	Vacuum infusion	en
dc.subject.other	Strain	en
dc.title	Experimental investigation of strain concentrations caused by inserts in sandwich beams	en
heal.type	journalArticle	en
heal.identifier.primary	10.1111/j.1475-1305.2007.00369.x	en
heal.identifier.secondary	http://dx.doi.org/10.1111/j.1475-1305.2007.00369.x	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	This paper presents an experimental study of the strain concentrations developing across the insert-core junctions in a sandwich beam with an implanted stiff insert into its core. Strain measurements were carried out at several positions on the skins and across the insert-core junction, for several sandwich beam specimens loaded in 3-points bending and having inserts with various geometries. The materials used were typical marine glass/polyester composite and PVC foams and the specimens were manufactured with the vacuum infusion method. A full material characterization was performed for the composite skins. The experimental results demonstrated a pure linear bending response of the specimens, as well as significant strain concentration factors across the insert-core junction, reaching values up to 3.3. Strain concentration factors measured for butt inserts were lower than those measured on the tension side of the specimens with scarf inserts. Transverse strains measurements verified that all specimens were in a plane stress state. © Journal compilation © 2008 Blackwell Publishing Ltd.	en
heal.publisher	BLACKWELL PUBLISHING	en
heal.journalName	Strain	en
dc.identifier.doi	10.1111/j.1475-1305.2007.00369.x	en
dc.identifier.isi	ISI:000257758800007	en
dc.identifier.volume	44	en
dc.identifier.issue	4	en
dc.identifier.spage	317	en
dc.identifier.epage	326	en