アコースティック・エミッション波形の逆解析による発生機構の解明
1988 年 1988 巻 398 号 p. 71-79
詳細
1988 年 1988 巻 398 号 p. 71-79
Based on a generalized theory of acoustic emission which we previously proposed, an inverse procedure for the source characterization of AE is discussed. To determine the source kinematics (crack type and crack orientation), a moment tensor representation is introduced. It is clarified that the eigenvalue analysis of the moment tensor can afford essential information on the kinematics of crack movement. Then, an deconvolution analysis provides the kinetics of crack motion as a source-time function. To confirm the applicability of the source inversion procedure, numerical experiments are performed on the surface observation of AE. By employing simulated AE waveforms, source characteristics are inversely solved and determined. Results demonstrate a great promise of the proposed procedure for the source characterization of AE.
