隣接内部き裂の欠陥評価法に関する検討

概要

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Fracture toughness tests were performed on the specimens with neighbouring embedded cracks produced by using the diffusion welding method in order to investigate the method of assessment for neighbouring embedded defects. It was found that for s/r_<e2>0.7 (where s/r_<e2> is the ratio of the for spacing of adjacent crack and the radius of a reduced circular crack with an area equivalent to that of a larger crake),the K-value can be estimated by supposing isolated cracks,and for s/r_<e2>≦0.7,it can be estimated by using a reduced circular crack with an area equivalent to ana added area of adjacent cracks. The proposed method of combining two adjacent dose not contradict with the one proposed in the previous paper,in which an embedded crack near surface is substituted with a surface crack.
社団法人日本材料学会の論文
1986-06-15