Design and analysis of a new six-point edge crack torsion (6ECT) specimen for mode III interlaminar fracture characterisation

A new six-point edge crack torsion (6ECT) test is proposed for the measurement of the mode III interlaminar critical strain energy release rate GIIIC. In contrast with the common ECT test, which is limited to the evaluation of initiation GIIIC values, the 6ECT allows the measurement of a mode III R-...

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Bibliographic Details
Main Author: Pereira, A.B. (author)
Other Authors: Morais, A.B. de (author), Moura, M.F.S.F. de (author)
Format: article
Language:eng
Published: 1000
Subjects:
Polymer-matrix composites (PMCs)
Delamination
Fracture toughness
Finite element analysis (FEA)
Online Access:http://hdl.handle.net/10773/5169
Country:Portugal
Oai:oai:ria.ua.pt:10773/5169
Description
Summary:A new six-point edge crack torsion (6ECT) test is proposed for the measurement of the mode III interlaminar critical strain energy release rate GIIIC. In contrast with the common ECT test, which is limited to the evaluation of initiation GIIIC values, the 6ECT allows the measurement of a mode III R-curve. Actually, the existence of such effect has been suggested in various experimental studies. The suitability of the 6ECT carbon/epoxy specimens combined with an effective crack based data reduction scheme is validated by finite element analyses with the virtual crack closure technique and cohesive elements.

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