Experimental determination of splitting in axially collapsed thick-walled fibre-reinforced composite frusta

Mamalis, AG; Manolakos, DE; Demosthenous, GA; Ioannidis, MB

dc.contributor.author	Mamalis, AG	en
dc.contributor.author	Manolakos, DE	en
dc.contributor.author	Demosthenous, GA	en
dc.contributor.author	Ioannidis, MB	en
dc.date.accessioned	2014-03-01T01:12:56Z
dc.date.available	2014-03-01T01:12:56Z
dc.date.issued	1997	en
dc.identifier.issn	0263-8231	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12279
dc.subject	Composite Material	en
dc.subject	Energy Absorption	en
dc.subject	Failure Mechanism	en
dc.subject	Low Energy	en
dc.subject	Strain Gauge	en
dc.subject	Axial Length	en
dc.subject	Wall Thickness	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Compression testing	en
dc.subject.other	Deformation	en
dc.subject.other	Dynamic response	en
dc.subject.other	Energy absorption	en
dc.subject.other	Failure analysis	en
dc.subject.other	Glass fiber reinforced plastics	en
dc.subject.other	Strain gages	en
dc.subject.other	Axially collapsed thick walled fiber reinforced composite frusta	en
dc.subject.other	Cylinders (shapes)	en
dc.title	Experimental determination of splitting in axially collapsed thick-walled fibre-reinforced composite frusta	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0263-8231(97)00047-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0263-8231(97)00047-5	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	The failure mechanisms of thick-walled circular frusta, made of glass-fibre-reinforced composite material, when subjected to axial compression are reported. Depending on wall thickness and the semi-apical angle, a conical shell may fail by four distinct deformation modes: progressive crushing, splitting, mid-length failure and progressive folding. Progressive crushing was found to offer the highest energy-absorption efficiency, the two latter belonging to catastrophic deformation modes with low energy-absorbing characteristics. Splitting usually follows after a short distance of progressive crushing for specimens with semi-apical angles greater than 25 degrees, constituting a transition mode from stable collapse to catastrophic collapse, which should be avoided in the lending of crashworthy structures. The present paper deals mainly with the splitting mechanism. On the basis of experimental observations pertaining to axially collapsed relatively thick-walled composite frusta of large semi-apical angles, a criterion for transition from stable collapse to this catastrophic deformation pattern is proposed. Strain gauges were mounted on the tube wall all over its axial length at highly strained positions and useful conclusions on the mechanical response of the composite material over the critical region are drawn from the strain data obtained. (C) 1998 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Thin-Walled Structures	en
dc.identifier.doi	10.1016/S0263-8231(97)00047-5	en
dc.identifier.isi	ISI:000074183800008	en
dc.identifier.volume	28	en
dc.identifier.issue	3-4	en
dc.identifier.spage	279	en
dc.identifier.epage	296	en