始終端部に欠陥を有する突合せ溶接部の脆性的破壊に関する実験的研究―端部放電加工切欠き試験体の耐力評価―
2005 年 12 巻 46 号 p. 1-6
詳細
2005 年 12 巻 46 号 p. 1-6
Defects induced by the welding procedure are recognized to be important factor for the joint strength . In the previous report, we described the experimental results and fracture analysis on brittle fracture in the butt joints with edge through thickness defects. There the observed strength of notched specimens by electric discharge cutting is lower than the expected value. This report discusses the relevant analysis on the above phenomena, attributing degradation of fracture toughness caused by NC gas cutting process.
