A new fibre bridging based analysis of the Double Cantilever Beam (DCB) test

A new analysis was developed for the Double Cantilever Beam (DCB) test. Its main objective is to compute mode I critical strain energy release rates G Ic unaffected by fibre bridging. In fact, the latter phenomenon often observed in standard unidirectional specimens is not considered representative...

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Bibliographic Details
Published in:Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2011-10, Vol.42 (10), p.1361-1368
Main Author: de Morais, A.B.
Format: Article
Language:English
Subjects:
A. Polymer–matrix composites (PMCs)
Applied sciences
B. Delamination
B. Fracture toughness
Bridging
C. Analytical modelling
Cantilever beams
carbon
Crack propagation
energy
Exact sciences and technology
Fibre
Forms of application and semi-finished materials
Fracture mechanics
glass fibers
Glass fibre
Laminates
Monitoring
Polymer industry, paints, wood
Technology of polymers
testing
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Summary:A new analysis was developed for the Double Cantilever Beam (DCB) test. Its main objective is to compute mode I critical strain energy release rates G Ic unaffected by fibre bridging. In fact, the latter phenomenon often observed in standard unidirectional specimens is not considered representative of most structural applications. The analysis developed applies a relatively simple numerical procedure to experimental load–displacement data for the initial crack propagation stages. Moreover, it does not require monitoring crack propagation during the tests. Application to experimental data for carbon and glass fibre composites gave consistent propagation G Ic that were similar to initiation values, thereby supporting the main assumptions of the proposed model.
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2011.05.019