枝状き裂を有する回転円板の混合モードに関する応力拡大係数　　光弾性法とコーステックス法による算定

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  • Stress intensity factors for the mixed mode in rotating disks having branched cracks. Determination by photoelastic and caustics method.
  • エダジョウ キレツ オ ユウスル カイテン エンバン ノ コンゴウ モード

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Fracture of blades or disks due to centrifugal force in rotary machines has often caused serious accidents. Branched cracks are frequently encountered in the unstable fracture of various brittle materials. (Furthermore, branched cracks have been observed behavior for the mixed mode with complicated geometry.) In this paper, stress intensity factors KI and KII were determined by using the photoelastic and caustics method, as a function of the branched crack of length ratio aII/aI and at different values of the branched crack angles 2θ at two velocities. The interaction in branched cracks was also discussed, together withacomparison of the results of these experimental methods.

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