An experimental characterization of nanocomposite strain and damage sensing in support of development of CNT-polymer nanocomposites for structural health monitoring (SHM) applications was conducted. As such, effort here is focused towards examining the piezoresistive behavior of poly(dimethyl-siloxane) (PDMS) and epoxy filled with acid treated single walled carbon nanotubes (COOH-SWNTs) under quasi-static compression and tension. Precision LCR Meter with two terminal method, in conjunction with mechanical testing and data acquisition system were used to measure instantaneous resistance values. Given the emphasis on SHM applications which correlate changes in electrical resistivity to deformation and damage, 0.1 wt% COOH-SWCNTs concentration below the nanocomposite electrical percolation threshold was considered for PDMS and epoxy. Measurements confirmed the onset of damage prior to noticeable effects in the stress-strain response. The resistance measurements were able to both detect strain for PDMS nanocomposites and damage initiation and provide continuous assessment of the damage state between damage initiation events for epoxy nanocomposites. Digital Image Correlation (DIC) System was used to observe the crack propagation on notched epoxy nanocomposite compact tension samples.
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ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 8–10, 2014
Newport, Rhode Island, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4614-8
PROCEEDINGS PAPER
Experimental Characterization of Strain and Damage Evolution in Carbon Nanotube-Polymer Nanocomposites
Engin Cem Sengezer,
Engin Cem Sengezer
Virginia Tech, Blacksburg, VA
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Gary D. Seidel
Gary D. Seidel
Virginia Tech, Blacksburg, VA
Search for other works by this author on:
Engin Cem Sengezer
Virginia Tech, Blacksburg, VA
Gary D. Seidel
Virginia Tech, Blacksburg, VA
Paper No:
SMASIS2014-7612, V001T01A021; 7 pages
Published Online:
December 8, 2014
Citation
Sengezer, EC, & Seidel, GD. "Experimental Characterization of Strain and Damage Evolution in Carbon Nanotube-Polymer Nanocomposites." Proceedings of the ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring; Keynote Presentation. Newport, Rhode Island, USA. September 8–10, 2014. V001T01A021. ASME. https://doi.org/10.1115/SMASIS2014-7612
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