期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 70, 期 4, 页码 614-621出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2009.12.011
关键词
Fracture toughness; Notch; Scanning electron microscopy (SEM); Fractography; Fibre failure
资金
- Engineering and Physical Sciences Research Council
- Rolls-Royce under a CASE [CASE/CNA/06/41]
The in-plane size, thickness and lay-up effects on the measured fracture toughness associated with fibre tensile failure were investigated for a T300/920 laminated carbon/epoxy material system. Compact tension specimens were tested with scaled in-plane size, increased thickness, and having various proportions of plies orientated at 0 degrees and 90 degrees to the loading direction. No in-plane size effects were discovered; however, testing revealed a thickness dependence. It was found that the ply toughness is significantly dependent on the thickness of the 0 degrees layers. Propagation values of toughness were measured to be 132 kJ/m(2) for specimens made up of [90/0(2)] sub-laminates and between 57 and 69 kJ/m(2) for all other configurations. Investigation of the fracture surfaces using SEM revealed that the increase in measured toughness for specimens with thicker 0 degrees plies was due to an increase in the amount of pulled-out 0 degrees fibres. (C) 2009 Elsevier Ltd. All rights reserved.
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