Electrical Resistivity Depended on Tensile Stress of Carbon Fiber

Abstract

To develop high temperature sensor, the change in an electrical resistivity of carbon fiber according to the stress increasing was measured as basic research. It was confirmed that the stress in the low stress zone decreased electrical resistivity, whereas the excess stress increased the electrical resistivity in the high stress zone.

Bending Stress Dependent Electrical Resistivity of Carbon Fiber in Polymer for Health Monitoring System

“…Thus, influences of tiny tensile stress on electrical resistivity of carbon fiber have been precisely studied. 6) A negative linear relationship between tensile stress and the electrical resistivity has been obtained. 6) If it is possible to apply for a stress sensor in carbon fiber reinforced polymer (CFRP), dependence of compressive stress on electrical resistivity is required.…”

“…6) Based on the results, the present tiny tensile stress dependence is discussed for carbon fiber buried in polymer during bending test, as shown in Fig. 5.…”

“…6(c)), it increases the electrical resistivity of carbon fiber. 6) Figure 6(c) shows a one-directional extended hexagonal structure with translation symmetry under tiny tensile loading. When the carbon fiber is loaded by low tensile stress, the hexagonal structure shows a preferred oriented direction.…”