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Title: Highly stretchable miniature strain sensor for large dynamic strain measurement

In this paper, a new type of highly stretchable strain sensor was developed to measure large strains. The sensor was based on the piezo-resistive response of carbon nanotube (CNT)/polydimethylsiloxane (PDMS) composite thin films. The piezo-resistive response of CNT composite gives accurate strain measurement with high frequency response, while the ultra-soft PDMS matrix provides high flexibility and ductility for large strain measurement. Experimental results show that the CNT/PDMS sensor measures large strains (up to 8 %) with an excellent linearity and a fast frequency response. The new miniature strain sensor also exhibits much higher sensitivities than the conventional foil strain gages, as its gauge factor is 500 times of that of the conventional foil strain gages.
 [1] ;  [2] ;  [2] ;  [2] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of North Texas, Denton, TX (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2191-5644; 617598
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Proceedings of the Society for Experimental Mechanics Series
Additional Journal Information:
Journal Name: Proceedings of the Society for Experimental Mechanics Series; Journal ID: ISSN 2191-5644
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
47 OTHER INSTRUMENTATION; large strain sensor; ultra stretchable; CNT/PDMS composite thin films; Piezo-resistive response; frequency response
OSTI Identifier: