Prediction of the long-term behaviour of high modulus fibres using the stepped isostress method (SSM)

Giannopoulos, IP; Burgoyne, CJ

dc.contributor.author	Giannopoulos, IP	en
dc.contributor.author	Burgoyne, CJ	en
dc.date.accessioned	2014-03-01T01:36:40Z
dc.date.available	2014-03-01T01:36:40Z
dc.date.issued	2011	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21387
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Accelerated testing	en
dc.subject.other	Additional stress	en
dc.subject.other	Creep curves	en
dc.subject.other	Creep response	en
dc.subject.other	Creep tests	en
dc.subject.other	Creep-rupture	en
dc.subject.other	Elevated temperature	en
dc.subject.other	Good correlations	en
dc.subject.other	Low stress	en
dc.subject.other	Stepped isothermal methods	en
dc.subject.other	Test method	en
dc.subject.other	Time-stress superposition	en
dc.subject.other	Chemical properties	en
dc.subject.other	Creep	en
dc.subject.other	Materials testing	en
dc.subject.other	Creep testing	en
dc.title	Prediction of the long-term behaviour of high modulus fibres using the stepped isostress method (SSM)	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10853-011-5743-x	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10853-011-5743-x	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	A new accelerated technique, called the stepped isostress method (SSM), is presented that allows accelerated testing of materials to determine their creep response, and in particular, their creep-rupture behaviour. The approach in SSM testing is similar to the more familiar stepped isothermal method (SIM) but the acceleration is now obtained by increasing the stress in steps rather than stepping the temperature. Additional stress provides energy to the system in an analogue of the effect of heat in SIM. This method relies on the time-stress superposition concept. Various theories, assumptions and the different steps of the method are described in detail. This method is advantageous when compared with SIM because there is no need to use elevated temperatures, which may affect the chemical properties of the tested materials. The applicability of this method is investigated. The paper presents testing on Kevlar 49 yarns using SSM. The resulting creep curves and rupture times are compared with those obtained from SIM and conventional creep testing carried out in the past. The results show good correlation between the three test methods. The ability to carry out reliable creep tests in a reasonable time at low stress levels allows a designer to have much more confidence in the data for creep-rupture behaviour for fibres and allows confident prediction of structural lifetimes. © 2011 Springer Science+Business Media, LLC.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Materials Science	en
dc.identifier.doi	10.1007/s10853-011-5743-x	en
dc.identifier.isi	ISI:000295177200003	en
dc.identifier.volume	46	en
dc.identifier.issue	24	en
dc.identifier.spage	7660	en
dc.identifier.epage	7671	en