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Transactions of the Japan Society of Mechanical Engineers. A | 1994

き裂開口変位に基づく,大き裂伝ぱ則と小き裂伝ぱ則の相互関係に関する検討 : S45C焼なまし材の回転曲げ疲労試験

西谷 弘信; 尾田 安司; 村上 禮三

Fatigue crack growth tests were carried out in order to give a unified explanation of the formal contradiction between two fatigue crack growth laws in small and large cracks, dl/dN∝σnl and dl/dN∝ΔKm. Cracks were monitored using the plastic replica method. Crack opening displacement ranges (ΔCOD s) were measured from the positive metal replicas made from the plastic replicas. In small and large cracks having the same growth rate, the relationships between ΔCOD s near the crack tips and the distance from the crack tip were almost the same. Therefore, ΔCOD near the crack tip can be considered as the main factor controlling the crack growth rate. Based on this, the two fatigue crack growth laws can be explained consistently.


日本機械学会論文集 A編 | 1980

半無限板におけるき裂と切欠き(き裂)の干渉効果

西谷 弘信; 尾田 安司


Transactions of the Japan Society of Mechanical Engineers. A | 2000

AFM/SEM観察に基づく疲労き裂伝ぱ機構の研究 : (第1報, (110)[001]Fe-3.2%Si単結晶におけるストライエーション形成域での検討)

尾田 安司; 古谷 佳之; 野口 博司; 東田 賢二


The Proceedings of the Materials and Mechanics Conference | 2007

P032 Fatigue Crack Growth Characteristics and Hydrogen Gas Effects on It in a Low Carbon Steel

松野 浩之; Matsuno Hiroyuki; 三上 知三; Mikami Tomozo; 尾田 安司; Oda Yasuji; 野口 博司; Noguchi Hiroshi


The Proceedings of Conference of Kyushu Branch | 2007

C34 The Effect of a Hydrogen Gas Environment on Fatigue Crack Growth Characteristics of 0.13%C Steel

村上 武継; Murakami Taketsugu; Yanari Yasutomo; 家成 康知; 萩原 聡佳; Hagihara Akiyoshi; Oda Yasuji; 尾田 安司; 野口 博司; Noguchi Hiroshi


The Proceedings of Conference of Kyushu Branch | 2007

C33 Fatigue Crack Growth Characteristics of Welded Pipeline Steel in a Hydrogen Gas Environment

家成 康知; Yanari Yasutomo; Hagihara Akiyoshi; 萩原 聡佳; 河本 恭平; Kawamoto Kyohei; Oda Yasuji; 尾田 安司; 野口 博司; Noguchi Hiroshi


年次大会講演論文集 : JSME annual meeting | 2006

3513 SUS304鋼微小穴材における疲労き裂の停留・伝ぱに及ぼす水素雰囲気の影響(S20-3 水素ガス雰囲気での疲労特性,S20 材料強度特性に及ぼす水素の影響)

松野 浩之; Matsuno Hiroyuki; Aoki Yuta; 青木 雄太; Hagihara Akiyoshi; 萩原 聡佳; 尾田 安司; Oda Yasuji; 野口 博司; Noguchi Hiroshi


The proceedings of the JSME annual meeting | 2006

3512 Effect of Hydrogen Environment on Fatigue crack growth of Friction Stir Welded Joints of A6061-T6 Aluminum Alloy

Hagihara Akiyoshi; 萩原 聡佳; 尾田 安司; Oda Yasuji; 野口 博司; Noguchi Hiroshi


The proceedings of the JSME annual meeting | 2006

3513 Effect of Hydrogen Environment on Non-propagation and Propagation of Fatigue Crack in a SUS304 Steel with Small Blind Holes

松野 浩之; Matsuno Hiroyuki; Aoki Yuta; 青木 雄太; Hagihara Akiyoshi; 萩原 聡佳; 尾田 安司; Oda Yasuji; 野口 博司; Noguchi Hiroshi


The proceedings of the JSME annual meeting | 2006

3510 Fatigue Crack Growth Characteristics of Carbon Steel in Hydrogen Gas Environment

Oda Yasuji; 尾田 安司; 浦松 剛; Uramatsu Tsuyoshi; 野口 博司; Noguchi Hiroshi

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