Abstract
The effect of loading rate on dynamic fracture behavior of particulate epoxy composites filled with milled micron size glass and carbon fibers (rod shaped filler) polymer composite is studied. The dynamic fracture experiments are carried out on pre-notched specimens. Three different dynamic strain-rates are achieved using different pulse shapers. An experimental setup comprising of a long-bar apparatus is used to deliver one-point edge impact loading to an unconstrained specimen. A controlled stress pulse is delivered to the specimen by launching a striker towards a long incident bar. Inertially driven crack propagation is seen in all cases. Using 2D Digital Image Correlation (DIC) method used in conjunction with high-speed photography (~300,000 frames per second), in-plane displacement fields around the propagating crack tip are determined during the facture event. The stress intensity factor histories are extracted using the optical measurements.
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Acknowledgement
The authors would like to thank the National Science Foundation for supporting this research through a grant NSF-CMMI-1100700.
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© 2014 The Society for Experimental Mechanics, Inc.
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Kushvaha, V., Branch, A., Tippur, H. (2014). Effect of Loading Rate on Dynamic Fracture Behavior of Glass and Carbon Fiber Modified Epoxy. In: Song, B., Casem, D., Kimberley, J. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00771-7_21
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DOI: https://doi.org/10.1007/978-3-319-00771-7_21
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