複数の異なる応力集中部を設けた光造形材の引張試験におけるAE計測

抄録

Quantitative discussion on the performance of the measurement system including the operation skill based on the reference is needed from the viewpoint of establishing the traceability of measurement. For acoustic emission (AE) method, a specimen which can control behavior of AE occurrence seems to be useful for standardization. In this study, possibility of realizing the standard specimen for AE measurement was examined. Specimens containing regions of different stress concentration resulted from different shape holes were made by stereolithography and those were subjected to tensile load. It was demonstrated that AE events at the intended location could be occurred for the specimen with different shape lozenged holes to change the degree of stress concentration. It was also found that drop-like holes for changing the degree of stress concentration rapidly are useful to generate AE events at the intended location and timing. From these results, possibility of realizing the standard specimens fro AE method was indicated.