声发射是材料在受力过程中产生的应力波发射,它是60年代中期在国外发展起来的一门无损检验技术.材料(或结构)在受力后,内部产生裂纹或裂纹扩展,就会发出应力波。把此应力波接收下来,就可以间接了解材料(或结构)在荷载作用下,内部损伤的发生和发展情况。这一技术首先在金属领域内发展起来,如今已比较成熟,已经可进行某些定量测量并能定位,但在复合材料领域中则还处于探索 Acoustic emission is the stress wave emission produced by the material in the process of stress, which is a non-destructive testing technique developed abroad in the mid-1960s. After the material (or structure) is subjected to internal force, cracks or crack propagation will occur Stress wave. By receiving this stress wave, you can indirectly understand the material (or structure) under load, the occurrence of internal damage and development. This technology first developed in the metal field, is now more mature, some quantitative measurements can be made and can be located, but in the field of composite materials is still in exploration