抄録
Basics of acoustic emission (AE) detection and the theory of AE waveforms are summarized. Measuring systems and AE parameters are discussed with a brief review of historical developments. Theoretical treatment leads to kinetics of crack motion by the deconvolution analysis and kinematics on crack type and crack orientation by the moment tensor analysis (SiGMA). With increasing need for maintenance, the nondestructive evaluation of in-service structures is being actively investigated. AE techniques look promising as a means of inspecting concrete structures and evaluating their structural integrity. Applications to construction monitoring are also receiving fresh attention. These practical applications are updated, along with fracture mechanics by SiGMA.
