Strain sensing behavior of electrically conductive fibers under large deformation

J. P. Wang, P. Xue, Xiaoming Tao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

48 Citations (Scopus)


Electrically conductive fiber/yarn/fabric is one of the promising materials as flexible conductive sensors because of their sensitivity to strain, temperature and humidity. Aiming at developing of effective flexible sensors, this study investigates experimentally the strain sensing behavior of PPy (polypyrrole)-coated Lycra fibers, showing that the electrically resistance of the conductive fibers changes with the deformation of fibers. The variation in electrically resistance is mainly related to the micro-cracks appearing on the fiber surface during deformation. Then, the effects of the characteristic parameters of the micro-cracks are studied statistically by means of image processing functions in MATLAB, and the governing parameters are determined. Based on the results, a model is built to describe the variation of electrical resistance by the parameters of the micro-cracks. The analytical results are compared with the experimental results, showing an acceptable agreement.
Original languageEnglish
Pages (from-to)2863-2869
Number of pages7
JournalMaterials Science and Engineering A
Issue number6
Publication statusPublished - 15 Mar 2011


  • Conductive fibers
  • Flexible strain sensors
  • Image processing
  • Modeling

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials


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