Fiber orientation dependence of continuous carbon/epoxy composites nonlinear viscoelastic behavior

Papanicolaou, GC; Zaoutsos, SP; Kontou, EA

dc.contributor.author	Papanicolaou, GC	en
dc.contributor.author	Zaoutsos, SP	en
dc.contributor.author	Kontou, EA	en
dc.date.accessioned	2014-03-01T01:20:31Z
dc.date.available	2014-03-01T01:20:31Z
dc.date.issued	2004	en
dc.identifier.issn	0266-3538	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15942
dc.subject	A. Carbon fibers	en
dc.subject	A. Polymer-matrix composites	en
dc.subject	B. Creep	en
dc.subject	B. Modeling	en
dc.subject	B. Nonlinear behavior	en
dc.subject	C. Anisotropy	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Carbon	en
dc.subject.other	Characterization	en
dc.subject.other	Creep	en
dc.subject.other	Durability	en
dc.subject.other	Mathematical models	en
dc.subject.other	Nonlinear systems	en
dc.subject.other	Viscoelasticity	en
dc.subject.other	Fiber polymeric systems	en
dc.subject.other	Nonlinear parameters	en
dc.subject.other	Stress dependence	en
dc.subject.other	Viscoelastic equations	en
dc.subject.other	Epoxy resins	en
dc.subject.other	anisotropy	en
dc.subject.other	carbon fiber	en
dc.subject.other	creep	en
dc.subject.other	fiber orientation	en
dc.subject.other	fiber reinforced composite	en
dc.subject.other	viscoelasticity	en
dc.title	Fiber orientation dependence of continuous carbon/epoxy composites nonlinear viscoelastic behavior	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.compscitech.2004.05.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.compscitech.2004.05.005	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The effect of fiber orientation on the nonlinear viscoelastic response of a unidirectional fiber polymeric system is examined. Based on Schapery's nonlinear viscoelastic equation and a model for the prediction of the nonlinear parameters, the nonlinear behavior of carbon/epoxy composite off-axis specimens is studied in order to achieve a complete characterization of an orthotropic system. The stress dependence of the parameters of the nonlinearity, introduced in the model is achieved and applied through a generic function developed and already confirmed [Compos. Sci. Technol. 58 (6) (1998) 883; Composites Part A 30 (7) (1999) 839; Progress in Durability Analysis in Composites Systems Conference Proceedings, DURACOSYS 97, Blacksburg, Virginia, USA, 14-17 September, 1997, Balkema Publishers, pp. 271-278; Compos. Sci. Technol. 59 (9) (1999) 1311] in the isotropic case. Verification of the model in the case of orthotropy is performed through a series of creep tests in composite specimens at various fiber orientations. The estimated values indicate an increase in the nonlinearity as the applied stress increases, while satisfactory predictions of the nonlinear parameters can be achieved, using the proposed model. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Composites Science and Technology	en
dc.identifier.doi	10.1016/j.compscitech.2004.05.005	en
dc.identifier.isi	ISI:000225011800011	en
dc.identifier.volume	64	en
dc.identifier.issue	16	en
dc.identifier.spage	2535	en
dc.identifier.epage	2545	en