从日常经验知道,物体破坏时要发出声音。但是在这种现象发生之前,物体内部已有细微裂纹在不断扩展,直至最终破坏。随着裂纹的扩展要释放弹性能和产生弹性波(超声波)。假如能看到这种微细变化,即使还没有产生裂纹,但由于应力作用,材料便进入塑性区,相位也开始移动,随之会产生弹性波。固体变形破坏时有发生声音的现象,这种声音就是上述的弹性波。声的发射以AE表示。声发射的名称以前就知道,特别是在可 We know from everyday experience that sound is emitted when objects are damaged. But before this happens, fine cracks inside the object are constantly expanding until it finally destroys. With the expansion of the crack to release elastic energy and produce elastic waves (ultrasonic). If you can see this subtle change, even if no cracks have yet occurred, but due to stress, the material will enter the plastic zone, the phase began to move, along with the elastic wave. Solid deformation damage occurs when the sound phenomenon, this sound is the above elastic wave. Acoustic emission AE said. The name of the acoustic emission was known before, especially when it was available