Journal
ENGINEERING FRACTURE MECHANICS
Volume 134, Issue -, Pages 148-167Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2014.12.005
Keywords
Composites; Fracture mechanics; Mixed-mode fracture; Fractography; Aerospace vehicles
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Funding
- Irish Research Council for Science, Engineering and Technology (IRCSET)
- Cytec Engineered Materials (CEM)
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In the present study, the mixed-mode fracture toughness of three composite joint systems (2 secondary bonded and 1 co-cured) was investigated. The two secondary bonded systems predominantly resulted in cohesive failure with occasional interlaminar failure during mixed-mode loading while the co-cured system failed adhesively. This was attributed to moisture stored in the prepreg being released during the co-cure process. The mode II toughness was consistently 5-6 times that of the corresponding mode I case for each system. The increased toughness was due to a combination of an increased fracture surface area and a larger damage zone. (C) 2014 Elsevier Ltd. All rights reserved.
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