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APPROXIMATE INTERLAMINAR FRACTURE ENVELOPES FOR UNIDIRECTIONAL E-GLASS/POLYESTER COMPOSITE

Periodica polytechnica. Mechanical engineering - Mas̆inostroenie, 2005-01, Vol.49 (1), p.15-24 [Peer Reviewed Journal]

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Title:
APPROXIMATE INTERLAMINAR FRACTURE ENVELOPES FOR UNIDIRECTIONAL E-GLASS/POLYESTER COMPOSITE
Author: Szekrényes, András ; Uj, József
Is Part Of: Periodica polytechnica. Mechanical engineering - Mas̆inostroenie, 2005-01, Vol.49 (1), p.15-24
Description: In this paper an experimental study is performed in order to determine anapproximate interlaminar fracture envelope of a unidirectional E-glasspolyester composite. First, the pure mode-I fracture toughness is determinedby using the standard double-cantilever beam (DCB) specimen. Second, thepure mode-II toughness of the material is evaluated by means of theover-notched flexure (ONF) specimen. Finally, the mixed-mode toughness isdetermined with the aid of the over-leg bending (OLB) coupon. Both theinitiation and propagation fracture toughness are determined within theextended ranges of crack length. The fracture envelopes are determined byusing the steady-state values of the fracture toughness at crack initiationand propagation. Two criteria are used to obtain the envelopes: thetraditional power expression and the physically more acceptable criterion byWilliams. The results are compared with previous envelopes and similarity isestablished.
Publisher: Budapest: Periodica Polytechnica, Budapest University of Technology and Economics
Language: English;German
Identifier: ISSN: 0324-6051
EISSN: 1587-379X
Source: Free E Journals
ProQuest Central
DOAJ Directory of Open Access Journals

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