セラミックス粒子強化複合材料の疲労損傷評価に関する研究 : 第1報,AE信号のカオス解析と熱履歴の影響

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  • Study on Evaluation of Fatigue Damage for Ceramics Particle Reinforced Composite Material with AE Method : 1st Report, Chaos Analysis of AE Signals and Influence of Heat History
  • セラミックス リュウシ キョウカ フクゴウ ザイリョウ ノ ヒロウ ソンショウ ヒョウカ ニ カンスル ケンキュウ ダイ1ポウ AE シンゴウ ノ カオス カイセキ ト ネツ リレキ ノ エイキョウ

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Ceramic particle reinforced composite materials (CPRCM) are expected as the structural member used under the severe environment such as the repeated condition of the heating and cooling. However, the technique that evaluates the fatigue damage is not established yet. Therefore, the establishment of the technique is wished. In this study, two type specimens were prepared. One is the specimen with the heat history of which the heating and cooling are repeated, and the other is the specimen without the heat history. And the tensile and the fatigue test were carried out. Then, the methods that evaluate the fracture types and the fatigue damage based on the features of the detected AE signals during the tests were proposed, and its validity was examined. As the result, the following things became clear: (1) it is possible to recognize the fracture types with weighted mean frequency distribution (WMFD) method. (2) it is possible to evaluate the fatigue damage by the information of the largest Liapunov exponents.

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