Effect of Dent on Self-Sensing Method of CFRP


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Authors’ group has been done researches on the damage monitoring of the laminated Carbon Fiber Reinforced Plastic (CFRP) using the electrical resistance change method. The method adopts reinforcement carbon fibers as sensors, and it is called self-sensing method. Using thin CFRP laminates, delamination crack location and dimension are identified with the electrical resistance change method. However, the electrical resistance decreases when a delamination crack is made in a thick CFRP beam. The present paper experimentally investigates the effect of the dent for the measurements of electrical resistance change. Indentation tests are performed for the thick CFRP plates. The effect of the dent is calculated compared with the effect of piezoresistivity caused by the residual stress relief. As a result, the effect of the dent is larger than the effect of the residual stress relief for the thick CFRP. For the thick CFRP, dents cause the significant reduction of the electrical resistance in the thickness direction, and that causes electrical resistance decrease.



Advanced Materials Research (Volumes 123-125)

Edited by:

Joong Hee Lee




A. Todoroki et al., "Effect of Dent on Self-Sensing Method of CFRP", Advanced Materials Research, Vols. 123-125, pp. 963-966, 2010

Online since:

August 2010




[1] K. Schulte, and Ch. Baron, Comp. Sci. & Tech., Vol. 36, p.63, (1989).

[2] N. Muto, et. al., J. Am. Ceram. Soc., Vol. 76, p.875, (1993).

[3] X. Wang and D.D.L. Chung, Polymer Comp., Vol. 18, p.692, (1997).

[4] P.E. Irving and C. Thiagarajan, Smart mater. & struct., Vol. 7, p.456, (1998).

[5] D.C. Seo and J.J. Lee, Comp. struct., Vol. 47, p.525, (1999).

[6] J. B. Park, T. Okabe, N. Takeda and W. A. Curtin, Comp. Part A, Vol. 33, p.267, (2002).

[7] K. Ogi and Y. Takao, Comp. Sci. & Tech., Vol. 65, p.231, (2005).

[8] A. Todoroki, et. al Comp. Sci. & Tech., Vol. 69, p.1841, (2009).

[9] A. Todoroki, and K. Omagari, J. of Solid Mech. & Mater. Eng., JSME, Vol. 2, p.718, (2008).

[10] A. Todoroki, Comp. Sci. & Tech., Vol. 61, p.1871, (2001).

[11] A. Todoroki, and Y. Tanaka, Comp. Sci. & Tech., Vol. 62, p.629, (2002).

[12] A. Todoroki, M. Ueda and Y. Shimamura, Key Eng. Mater., Vol. 353-358, p.1298, (2007).

[13] A. Todoroki, et. al, J. of Solid Mech. & Mater. Eng., JSME, Vol. 4, p.1, (2010). -25000 -15000 -5000 5000 15000 Analysis (I)+(II)+(III) (III) Dent occurrence (II) Piezoresistivity (I) Insulation of current path Experiment ∆R/R [µ].