Abstract
This paper describes an experimental investigation into progressive damage development in notched fibre-reinforced composites laminates. The Over-height Compact Tension (OCT) test captures the behaviour of laminates typical of large structures and permits the stable formation of a process zone ahead of the crack tip. This allows a study of the influence of sub-critical damage on progression of fibre failure. A range of lay-ups have been tested using dispersed and blocked plies in the thickness direction. The load vs. pin opening displacement (POD) curve is used to characterise the progressive failure of specimens. A number of interrupted tests were performed for each lay-up to capture the sub-critical damage process before the onset of fibre fracture. Results show that dispersed plies promote fibre failure and crack growth whilst blocked plies promote a larger amount of splitting and delamination which in turn causes a larger process zone and ultimately a tougher laminate. (C) 2009 Elsevier Ltd. All rights reserved.
Translated title of the contribution | Experimental study of damage propagation in overheight compact tension tests |
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Original language | English |
Pages (from-to) | 1891-1899 |
Number of pages | 9 |
Journal | Composites Part A: Applied Science and Manufacturing |
Volume | 40 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2009 |
Event | 4th International Conference on Composites Testing and Model Indenification - Dayton Duration: 20 Oct 2008 → 22 Oct 2008 |
Keywords
- INTRALAMINAR FRACTURE-TOUGHNESS
- Over-height Compact Tension test
- NOTCHED COMPOSITES
- Mechanical testing
- Damage tolerance
- Fracture
- COMPUTED-TOMOGRAPHY
- STRENGTH
- FAILURE
- Delamination