Abstract
The objective of the current study is to employ precise and detailed nano-scale investigation to determine the physical mechanisms that contribute to the mechanical performance benefits of nano-particulate inclusions in polymer and polymer composite materials. A significant amount of work by the research community has experimentally illustrated the effective property benefits of nano-inclusions, thus the current work has elucidated some of the phenomenological causes behind these enhancement observations in a controlled fashion through a combination of micromechanical modeling and nano-scale experimentation under SEM observation. Nano-scale Mode I and Mode II fracture specimens have been designed to allow direct observation of crack growth in a nanoparticulate-reinforced epoxy system. Modeling employing the X-FEM node enrichment scheme for investigation of arbitrary-path crack propagation has been performed. Considerations critical to the accuracy of representation as well as the tractability of computation have been developed.
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Acknowledgements
The authors would like to express their appreciation to Dr. Brian Schuster and Dr. Jason Robinette of the Army Research Laboratory for their efforts and support.
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Karkkainen, R.L., Walter, T., Bujanda, A. (2013). Nano-scale Investigation of Microstructural Phenomenon Contributing to Toughening of Nanoparticulate Reinforced Polymers. In: Chalivendra, V., Song, B., Casem, D. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4238-7_28
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