Electrical and acoustic vibroscopic measurements for determining carbon nanotube fiber linear density
- Rice Univ., Houston, TX (United States)
- NASA-Langley Research Center, Hampton, VA (United States)
Lightweight materials for next-generation electrical and mechanical applications are expected to have significant impacts on aerospace and ground transportation by reducing fuel consumption. Assessing the potential of novel wiring or fibers requires accurate measurement of linear density. The linear densities of fibers are measured by determining the fiber's resonant frequency vibroscopically, which requires complex mechanical equipment for vibrating the fiber. Here, we leverage the electrical conductivity of carbon nanotube (CNT) fibers to induce vibrations by applying an alternating current (AC) to a fiber under a known tension in the presence of a permanent magnetic field, eliminating the need for me- chanical actuation. The fiber vibrates at maximum amplitude when the AC frequency matches the fiber's fundamental resonant frequency, creating an audible sound and inducing measurable changes in the fiber electrical properties. As a result, linear density can be calculated accurately from the resonant frequency or the changes in electrical properties in this simplified apparatus during a tensile test.
- Research Organization:
- Rice Univ., Houston, TX (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; Robert A Welch Foundation; National Science Foundation (NSF); USDOE
- Grant/Contract Number:
- EE0007865; C-1668; DGE# 1450681; NSTRF14
- OSTI ID:
- 1638570
- Alternate ID(s):
- OSTI ID: 1635861
- Journal Information:
- Carbon, Vol. 144, Issue C; ISSN 0008-6223
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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