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Strain energy release rate in shaft-loaded blister tests for composite repairs on steel

Lookup NU author(s): Johannes Linden, Dr George Kotsikos, Professor Geoff Gibson


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The design of composite repairs of corroded oil and gas pipelines must take into account the strength of the interface adhesion between composite and metal. A shaft-loaded blister test is a common method to measure interface fracture toughness and energy release rate. The study aimed on evaluating shaft loaded blister tests as replacements for more complex pressure blister tests. Specimens investigated were thick fibre-reinforced plates bonded on metal disks as substrates containing a circular through-hole defect. This paper presents the influence of different punch head geometries on the resulting energy release rates and compares the results with blister tests using fluid pressure. Test and simulation results are presented and analytical solutions were derived and evaluated to establish best fitting formulations. It was shown, that significant variations between the different means of loading exist. (C) 2015 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Linden JM, Kotsikos G, Gibson AG

Publication type: Article

Publication status: Published

Journal: Composites Part A: Applied Science and Manufacturing

Year: 2016

Volume: 81

Pages: 129-138

Print publication date: 01/02/2016

Online publication date: 04/11/2015

Acceptance date: 20/10/2015

ISSN (print): 1359-835X

ISSN (electronic): 1878-5840

Publisher: Elsevier


DOI: 10.1016/j.compositesa.2015.10.026


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