Matrix cracking behavior of carbon fiber/bismaleimide resin composite laminates under fatigue loading
Book
·
OSTI ID:109725
- Univ. of Delaware, Newark, DE (United States). Center for Composite Materials and Materials Science Program
The matrix cracking behavior of cross-ply laminates of carbon fiber/bismaleimide resin (X5260/G40-800) under fatigue loading was investigated. Matrix cracking behavior was characterized through acoustic emission, ultrasonic C-scan, edge replica tape, and optical microscopy techniques. An experiment using a combination of static tension and tension-tension fatigue showed that after a crack was initiated in static tension and fatigued later, multiple cracks formed more rapidly than if the specimen was only fatigued without preloading. A model was developed to correlate the results. The crack-closure technique was used in the finite element method to calculate the energy release rate at the crack tip. A fatigue crack growth law (Paris Rule) was applied to define the number of fatigue cycles required for the onset of microcracking.
- OSTI ID:
- 109725
- Report Number(s):
- CONF-950521--; ISBN 1-56676-313-4
- Country of Publication:
- United States
- Language:
- English
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