Abstract
Evaluation of microcracking behavior, among other nondestructive evaluations, is important for understanding the fracture of materials and improving their fracture resistance. This paper deals with the principle of the inverse problem analysis of acoustic emission (AE), the method of analyzing the moment tensor of microcracks developed by the author et al., and examples of the method’s application. The paper goes on to introduce the concept of the smart materials and structural systems that perform nondestructive evaluation on their own and function to repair and restore defects. The paper also overviews the present state of research and development.
