スーパエンプラ製機器の高温疲労寿命曲線における非線形挙動

概要

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The purpose of this study is to investigate the relationship between nonlinear behavior of fatigue life curves and fatigue life for carbon-fiber-reinforced PEEK and PA 66 under two-step loading above T_g (Glass transition temperature) and below T_g. As a results, the fatigue life curves in the case of PEEK/Below T_g, PA 66/Above T_g and PA 66/Below T_y were found linear. Moreover, the fatigue lives were calculated by linear cumulative damage law under two step loading. On the other hand, the fatigue life curves in the case of PEEK/Above T_y was found nonlinear. Moreover, the fatigue lives were not calculated by linear cumulative damage law under two-step loading. It was found that these factors occurred because of 'Transition phenomenon' which fatigue fracture mechanisms transferred in the range between two fatigue life curves.
一般社団法人日本機械学会の論文
1999-06-25