抄録
This paper describes effect of temperature on the resistance and piezoresistance behavior in a carbon fiber reinforced plastics (CFRP) unidirectional (UD) laminate under tensile loading. Resistance change of on- and off-axis specimens was examined during tensile loading at various temperatures. It was observed that the initial gage factor (IGF) shows temperature dependence for all the off-axis angles with the maximum at the angle of 12 degrees for all temperatures. Tempera-ture dependence of IGF was mainly attributed to temperature-dependent piezoresistivity and compliance. The resistivity decreased with increasing temperature for all the off-axis angles. This negative temperature coefficient of the UD laminate is ascribed to the temperature dependence of resistance of carbon fiber and the contact resistance between fibers.
