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Multiscale Modeling and Characterization of the Effects of Damage Evolution on the Multifunctional Properties of Polymer Nanocomposites

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Technical Report,15 Apr 2012,14 Apr 2016

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Virginia Polytechnic Inst and State Univ Blacksburg United States

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The objective of the research was to develop a novel multiscale modeling approach for capturing the effects of damage evolution on the mechanical and electrical properties of carbon nanotube-polymer nanocomposites. Focus was placed on understanding and capturing the key deformation and damage mechanisms which lead to measurable changes in the macroscale sensing properties e.g. changes in electrical conductivity or piezoresistivity in proposed nanocomposite structural health monitoring sensors. As part of an addendum, the effort was extended to explore the use of carbon nanotube nanocomposite piezoresistive sensing in performing structural health monitoring in epoxy-based energetic materials. The focus was to distribute the sensing network throughout the epoxy matrix phase of mock energetic materials and assess whether or not the large nanocomposite gauge factors 2 - 20 , compared to the 2 for conventional strain gauges can be maintained within the energetic composite architecture.

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