AE法によるMIM材の疲労損傷評価に関する研究 : 第2報,最大リアプノフ指数の移動平均による評価

概要

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Metal injection molding (MIM) is a suitable production technique for the mass production of the products of the complicated shape. However, the studies on the dynamic properties such as the fatigue strength of the materials produced by the technique are not enough. Our aim is to evaluate the fatigue damage of the materials with AE method. In the previous study, the detected AE signals during the fatigue testing of the material were analyzed, and the possibility of the damage evaluation by the analysis method that was proposed was shown. In this study, it was examined to evaluate the damage by the moving average of the largest lyapunov exponents of the signals. As the result, it became clear that the damage is quantitatively evaluated by observing the difference in the average of the exponents of the high and low frequency components of the detected signals, and the damage is evaluated in the real-time.
2009-01-25