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Journal of Materials Science

, Volume 41, Issue 8, pp 2281–2289 | Cite as

Method of sensing impact damage in carbon fiber polymer-matrix composite by electrical resistance measurement

  • Shoukai Wang
  • Daojun Wang
  • D. D. L. ChungEmail author
  • Jaycee H. Chung
Article

Abstract

The method of sensing impact damage in carbon fiber polymer-matrix structural composite by DC electrical resistance measurement was evaluated by measuring the resistance of the top surface (surface receiving impact). The resistance obtained by using the four-probe method is a more sensitive, more precise (less data scatter) and more accurate indicator of composite damage than that obtained by using the two-probe method. The data scatter is low for both four-probe and two-probe resistances for impact energy up to 5 J, but it is lower for the four-probe resistance than the two-probe resistance. The data scatter increases with damage. It is attributed to electrical contact degradation. The four-probe resistance of the 8-lamina composite increases upon impact, such that the fractional increase diminishes as the distance from the point of impact increases. The four-probe resistance of the 24-lamina composite increases upon impact for the specimen segment containing the point of impact, but decreases slightly upon impact for the segments within about 20 mm from the point of impact. The two-probe resistance has less tendency to decrease upon impact than the four-probe resistance.

Keywords

Carbon Fiber Electrical Resistance Measurement Impact Energy Electrical Contact Fractional Increase 

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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Shoukai Wang
    • 1
  • Daojun Wang
    • 1
  • D. D. L. Chung
    • 1
    Email author
  • Jaycee H. Chung
    • 2
  1. 1.Composite Materials Research Laboratory, University at BuffaloState University of New YorkBuffaloUSA
  2. 2.Global Contour Ltd.Rockwall

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