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Fracture mechanics evaluation of a crack generated in SiC/SiC composite first wall

Ryoichi Kurihara, Shuzo Ueda, Satoshi Nishio, Yasushi Seki2001年Fusion Engineering and DesignIF 1.7出版社

AbstractThe finite element analysis was carried out for the blanket first wall made of SiC/SiC composite material for the future Tokamak fusion power reactor DREAM, which is conceptually designed in the Japan Atomic Energy Research Institute. Bending deflection and stress distribution were analyzed when the thermal expansion was constrained at the edge of the first wall. Preliminary fracture mechanics evaluation was carried out, assuming a crack in the first wall, by the finite element code ADINA. The result showed that it is necessary to find a new device for releasing thermal expansion in the design of the first wall. Effect of the fiber bridging on the crack arrest was studied in the first wall structure made of SiC/SiC composite material.

日本語訳

将来の核融合動力炉であるDREAM(日本原子力研究所で概念設計された)のブランケット第一壁に使用されるSiC/SiC複合材料について、有限要素解析を実施した。第一壁の端部で熱膨張が拘束された場合の曲げたわみと応力分布を解析した。第一壁に亀裂を想定した予備的破壊力学評価を、有限要素コードADINAを用いて実施した。その結果、第一壁の設計において熱膨張を解放するための新たな装置を見出す必要があることが示された。SiC/SiC複合材料で作製された第一壁構造における亀裂進展停止に対する繊維架橋の効果についても検討した。

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