Abstract
This paper describes a method to evaluate the fracture property of nano-materials with Acoustic Emission (AE) method. In this study, the nano-material was prepared by Molecular Dynamics (MD) method and its AE were detected as "velocity of atoms at material surface". Several emitted AE of nano-material were measured while tensile testing, and they were compared with the real AE signals. The AE parameters (AE energy, frequency and fractal dimension of AE waveform) of nano-material depended on structure transformation of the nano-material, and the behaviors of "Relation between strain rate and AE energy" and "Transition of the fractal dimension and the frequency" were similar to the real AE signals. From these results, it is shown that a possibility of the evaluation on the fracture property in nano-materials with AE method.
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