2534 スマート構造・材料に関する基礎的研究 : き裂の進展抑制と修復について(J10-8 き裂治癒,J10 知的材料・構造システム)

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In this study, we applied the concept of smart structures/materials to the alumina (Al_2O_3) ceramics and granted them the self crack detection, the crack growth control and the crack-healing abilities. And the four-point bending test was carried out in them. In this smart system, the AE sensor detects the crack growth, the SMA controls it and the YAG laser irradiation heals the crack on the surface of specimen. In order to evaluate the crack growth control and the crack-healing abilities, the pre-cracked specimens in which the cracks were generated by the Vickers indenter were prepared. The YAG laser irradiation during the bending test showed the crack-healing effect, and the specimen recovered the bending strength 36% than the pre-cracked specimen. And the SMA decreased the cumulative AE events 30% than no-suppressed specimen.
社団法人日本機械学会の論文
2007-09-07