抄録
This paper describes embedment of a FBG (Fiber Bragg Grating) sensor in an aluminum matrix for deformation monitoring of aluminum based composites as a new application of FBG sensors in the field of structural materials. As FBG sensors are normally not handled at high temperatures, there high temperature stability was investigated to select a method of embedding them in aluminum matrix. Taking the results into consideration, a FBG sensor was successfully embedded in pure aluminum by the interphase forming/bonding method using copper insert. The aluminum specimen was tensile tested under monitoring the peak wavelength shift of the reflected light from the embedded FBG sensor and the level of optical transmissionloss. The obtained results show that it is working as a strain sensor in aluminum matrix even when the strain becomes larger than that of optical fiber fracture.
