Journal
COMPOSITE STRUCTURES
Volume 93, Issue 11, Pages 3013-3018Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2011.04.034
Keywords
Carbon nanotubes; Multilayer foams; Buckling; Mechanical properties
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Funding
- Institute for Collaborative Biotechnologies [W911NF-09-D-0001]
- Army Research Office
- University Centre for Risk Prediction and Prevention (CUGRI)
- U.S. Department of Defense
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We test and model the mechanical response of a multilayer composite structure composed of alternating layers of aligned carbon nanotubes and copper foils under compression. We employ a bistable mass-spring model to capture the three-phase hysteretic response of the loading curve with excellent agreement with the experimental observations. An in situ identification procedure is proposed to quantify the material parameters corresponding to the mesoscopic scale of the structure. We refine the results using a genetic algorithm and compare the response of two different models based on three and four springs in series. The localization of deformation can be accurately captured by these simplified models, which hold promise for the design of novel materials with tailored deformation responses. (C) 2011 Elsevier Ltd. All rights reserved.
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