S0302-3-2 レーザーを用いた鋼材の疲労損傷の全視野評価(実験力学における計測・解析法の新展開(3))

概要

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We investigated a method to evaluate fatigue damage of mild steels without contact using laser. In the previous work, we used a laser spot beam illuminating the fatigue damaged point of a specimen surface and observed diffusion pattern change of the reflected light from the specimen surface due to surface change by slipband. In this paper, we tried to detect fatigue damaged area in the full field of the observing area with a CCD camera and evaluate fatigue damage using an optical setup with a laser slit beam. The results showed that full-field visualization and evaluation of fatigue damage is possible by scanning the slit beam on the specimen surface and observing reflected light pattern of the slit beam. The authors also tried to find distribution of evaluated fatigue damage inside the fatigue area.
社団法人日本機械学会の論文
2009-09-12