抄録
Carbon powders (CP) and carbon fiber (CF) were introduced into glass fiber reinforced plastics (GFRP) composites to obtain fracture detection function. The specimens were evaluated through the relation between a load-displacement curve and an electrical resistance change curve in three point bending test. CP containing GFRP (CPGFRP) has a sensitivity of electrical resistance change at much lower load level than CF containing GFRP (CPGFRP). In loading/unloading tests, CPGFRP showed a large amount of residual electrical resistance which enables the estimation of loading hysteresis.
