Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 95, Issue -, Pages 185-193Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2016.10.017
Keywords
Mode II; Delamination; Testing method; Fatigue; 3-ENF; Composites
Funding
- Spanish Government (Ministerio de Economia y Competitividad) [TRA2015-71491-R]
- European Union [01/2013]
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Crack growth rate curves provide information about the delamination resistance of composite materials under cyclic loading. The existing methodologies for mode II fatigue testing using three-point bending end-notched flexure (3-ENF) under constant cyclic displacement conditions yield discontinuous delamination growth rate curves, therefore requiring a batch of several specimens to be tested under different severity conditions in order to fully characterize the crack growth. This work describes a variable cyclic displacement test procedure that, in combination with the real time monitoring of the specimen's compliance, allows the crack growth rate to be measured for the desired range of severities with a single specimen, thus avoiding any human intervention during the test. (C) 2016 Elsevier Ltd. All rights reserved.
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