Abstract
Recently large-scale researches are taking place for the characterization of materials on the basis of crack initiation and propagation in the industrial and biomedical sectors. Acoustic emission (AE) technique is now very effective for that purpose due to its dynamic monitoring ability. According to AE size scaling theory, some proportional relationships are established among the AE parameters i.e. AE hits, AE energy and crack volume etc. The evaluation of fractal dimension in those relationships are essential to assess the irregularity in crack zone. The development of cracks and the release of AE wave is analyzed due to tensile loading on a steel (S25C) plate until it is ruptured. The images of the cracks during formation and propagation are analyzed to find out the fractal dimension for establishing the crack propagation characteristics. Thus, the theoretical proportionality relations of AE parameters are interpreted experimentally during crack propagation.
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