Abstract
Polymers are frequently used in applications in which they may be exposed to high rate or impact loading and there is growing industrial importance in understanding their mechanical behaviour at different strain rates. This paper describes research that has been performed to better understand and predict the dependence on strain rate of mechanical properties such as yield stress. In particular, the processes that govern the high rate response within polymers are better understood by investigating the relationship between rate dependence and temperature dependence. In particular, the mechanical behaviour of poly(vinyl chloride) with different amounts of plasticizer has been studied at strain rates from 0.001 to 5,000 s−1 and temperatures from −115 °C to +80 °C. Time-temperature superposition and a novel experimental method are used to understand the effects of strain rate in terms of relevant transitions and adiabatic heating in the material. The experimental work presented is supported by constitutive modeling and careful consideration of the processes involved in the high rate loading.
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Acknowledgements
The authors would like to thank Dr. J.L. Jordan and Dr. J.R. Foley for their support of the research, R. Duffin and R. Froud for ongoing technical support, and H. Schiffter and T. Healey for help in conducting DMA testing. M.J. Kendall would also like to acknowledge Dr. I. Dyson for help with low rate testing, and Dr. D.R. Drodge and Dr. E.J. Wielewski for helpful discussions and suggestions. Effort sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under grant number FA8655-09-1-3088. The US Government is authorized to reproduce and distribute reprints for Governmental purpose notwithstanding any copyright notation thereon. The authors thank Dr. R. Pollak for his ongoing support.
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© 2014 The Society for Experimental Mechanics, Inc.
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Kendall, M.J., Siviour, C.R. (2014). Strain Rate and Temperature Dependence in PVC. 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_14
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DOI: https://doi.org/10.1007/978-3-319-00771-7_14
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