Sensitivity of the Carbon Fiber Interface in Epoxy
In order to improve the gauge factor of polymer-matrix carbon fiber reinforced composites (CFRP) for strain sensing, the carbon fiber sensitive interface was constructed in epoxy by effectively overlapping the CFRP laminates in local area. The strain sensitivities of the carbon fiber interface were proved by the cyclic tension test on the base specimens covered by the carbon fiber composites with the sensitive interface, and their much bigger gauge factors were revealed by the comparison with the polymer-matrix continuous carbon fiber composite. The sensitivity of the carbon fiber interface is originated from the change of the interfacial points due to the interfacial stress.
H. S. Zheng et al., "Sensitivity of the Carbon Fiber Interface in Epoxy", Applied Mechanics and Materials, Vol. 69, pp. 79-82, 2011