Low Strain Rate Failure of Compliant Flexures
Final rept. 29 Apr 2010-29 Jun 2011
IMPERIAL COLL LONDON (UNITED KINGDOM) DEPT OF AERONAUTICS
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This project investigates the time-dependent properties of thin carbon fiber composite flexures when they are held in a folded stowed configuration for long periods of time. The resulting behavior is shown to be complex and time dependent in an experimental program to determine the full field strain and evolution of microstructural damage. The program uses a developed experimental rig which uses digital image correlation to measure the strain behavior over long time durations. Possible numerical analyses to capture the observed responses are considered. It is concluded that an understanding of the microstructural and probabilistic behavior is crucial to the understanding of long term flexure properties.