Journal
COMPOSITES PART B-ENGINEERING
Volume 40, Issue 6, Pages 522-529Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2009.04.020
Keywords
Carbon-carbon composites (CCCs); Nano-structures; Impact behavior; Laminate mechanics; Blast-resistant composites
Funding
- Army Research Office (ARO) [W911NF-08-1-0421]
- Defense Threat Reduction Agency (DTRA) [HDTRA1-08-1-0017 P00001]
- National Science Foundation (NSF) [CMMI-0800249]
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A reliable process for the design of blast-resistance composite laminates is needed. We consider here the use of carbon nanotubes (CNTs) to enhance the mechanical properties of composite interface layers. The use of CNTs not only enhances the strength of the interface but also significantly alters stress propagation in composite laminates. A simplified wave propagation simulation is developed and the optimal CNT content in the interface layer is determined using multi-objective optimization paradigms. The optimization process targets minimizing the ratio of the stress developed in the layers to the strength of that layer for all the composite laminate layers. Two optimization methods are employed to identify the optimal CNT content. A case study demonstrating the design of five-layer composite laminate subjected to a blast event is used to demonstrate the concept. It is shown that the addition of 2% and 4% CNTs by weight to the epoxy interfaces results in significant enhancement of the composite ability to resist blast. (C) 2009 Elsevier Ltd. All rights reserved.
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