FRACTAL CHARACTERISTICS OF AE PROCESS OF CONCRETE MATERIAL AND APPLICATION TO THE FRACTURE ANALYSES
混凝土材料声发射过程分形特征及其在断裂分析中的应用

In order to obtain the relationship between the acoustic emission process and fracture evolution of concrete material, the concept of relevant fractal function of acoustic emission process is given .The existence of fractal characteristics of acoustic emission process is proved through experiments firstly. Then. The variation tendency of relevant fractal dimensions in the fracture process of material is analyzed by three-point bending test of concrete specimen. The identification pattern of fractal characteristics for critical fracture is determined. The results show that the acoustic' emission process of concrete material is of obvious fractal characteristics, and the different fractal characteristic parameters of acoustic emission in the critical state show some "identification pattern" which can be used to identify the characteristics of critical fracture.