摘要
由声发射信号特征分析爆破试验过程中16MnR乙炔瓶预制裂纹的活动。一种以范性形变松弛应力,由于形变引起壁厚的减薄和材料的加工硬化,爆破时发生快速撕裂;另一种是预制裂纹前沿多次发生低能量撕裂,最后的爆破也比较“平稳”。
The motions of prefabricated cracks in 16MnR acetylene cylinders are analysed according to the characteristics of acoustic emission signals. The first case is releasing stress through plastic deformation. The deformation makes the wall thinning and material hardening, and rapid tears bring about in burst. In other case, many times of low energy tears occur in front of the prefabricated cracks, and the last burst is rather smooth.
出处
《无损检测》
1997年第11期311-313,319,共4页
Nondestructive Testing
