A new remote strain measurement method has been developed by applying the highly sensitive change of electronic conductivity of CNTs. Multi-walled CNTs were dispersed in various kinds of resins to form a thin film which can be attached rounded surfaces. The length of the CNTs was about a few μm. One of the base materials of resin employed was polycarbonate and the volumetric concentration of CNT dispersed was about 11.5%. The thickness of the film was about 500 μm. An uni-axial strain was applied to the CNT-dispersed resin by applying a 4 point bending method, and the change of the electric resistance was measured. The range of the applied strain was from −0.025% to 0.025%. The electric resistance changed almost linearly with the applied strain. The ratio of the resistance change under the tensile strain was about 40%/1000-μstrain and that under the compressive strain was about 15%/1000-μstrain. The micro wave of 99.5 GHz was irradiated to the CNT-dispersed polycarbonate film through the metallic prove 1 mm in diameter. The change of the intensity of the beam reflected from the film was measured by changing the amplitude of the uni-axial in-plane strain applied to the film. The intensity of the reflected beam increased almost linearly with the increase of the applied tensile strain and the change rate of the intensity was about 0.5%/1000-μstrain. This result clearly indicated that the surface dynamic strain can be detected by micro wave nondestructively and remotely.
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ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
978-0-7918-4359-8
PROCEEDINGS PAPER
Remote Strain Measurement by Multi-Walled Carbon Nanotube-Dispersed Resin
Katsuya Osaki,
Katsuya Osaki
Tohoku University, Sendai, Miyagi, Japan
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Hideki Fuji,
Hideki Fuji
Tohoku University, Sendai, Miyagi, Japan
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Masato Onishi,
Masato Onishi
Tohoku University, Sendai, Miyagi, Japan
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Ken Suzuki,
Ken Suzuki
Tohoku University, Sendai, Miyagi, Japan
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Hideo Miura
Hideo Miura
Tohoku University, Sendai, Miyagi, Japan
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Katsuya Osaki
Tohoku University, Sendai, Miyagi, Japan
Hideki Fuji
Tohoku University, Sendai, Miyagi, Japan
Masato Onishi
Tohoku University, Sendai, Miyagi, Japan
Ken Suzuki
Tohoku University, Sendai, Miyagi, Japan
Hideo Miura
Tohoku University, Sendai, Miyagi, Japan
Paper No:
InterPACK2009-89146, pp. 569-574; 6 pages
Published Online:
December 24, 2010
Citation
Osaki, K, Fuji, H, Onishi, M, Suzuki, K, & Miura, H. "Remote Strain Measurement by Multi-Walled Carbon Nanotube-Dispersed Resin." Proceedings of the ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASME 2009 InterPACK Conference, Volume 1. San Francisco, California, USA. July 19–23, 2009. pp. 569-574. ASME. https://doi.org/10.1115/InterPACK2009-89146
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