本文之主要目的在於探討延性破壞現象下所產生之應力波的特性，此種應力波的特性可用來確定結構系統的破壞程度。根據研究結果，此種應力波確可配合超音波技術來進行檢驗工作。
The objective of this paper is to study the characteristics of the acoustic emission during ductile cracking. This acoustic emission can be used to identify the integrity of the structure. It is a active process (does not need any external power source to generate the wave, as the convention NTD technique). Therefore based on the study result, this kind of technique can be used for the process monitoring.
