The fundamentals associated with acoustic emission monitoring of fatigue crack initiation and propagation of Ti-6AI-4V were studied. Acoustic emission can detect and locate incipient fatigue crack extensions of approximately 1 0 gm. The technique therefore can serve as a sensitive warning to material failure. There are three distinct stages during which acoustic emission is generated. These sta...

In the paper, results of investigations on properties acoustic emission signals generated in a tested pressure vessel are presented. The were performed by repeating several times following procedure: an increase pressure, maintaining given level, further and then at new determined level. During tests recorded measuring system 8AE-PD with piezoelectric sensors D9241A. used eight-channel enables ...

Acoustic emission method has a major application in the detection of the oil storage tank damage. Therefore, classification of acoustic emission signals has great significance. A classification method based on support vector machines is proposed for its good generalization performance and less training data. Based on cross validation method, the genetic algorithm is compared with the grid searc...