Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium

研究成果: 著書/レポートタイプへの貢献会議での発言

抄録

In order to identify the fatigue limit for a sharp notched specimen of commercially pure titanium, rotating bending fatigue tests on smooth and notched specimens were curried out. In previous studies, it was found that the fatigue limit for a sharp notched specimen of commercially pure titanium could not be determined and it is not sure whether it fail over N=10 7 cycles or not. Based on the experimental results, in the smooth specimen and notched specimen (p=1.0mm), they have fatigue limits and knee points, while the sharp notched specimen (p=0.1mm) does not. As an estimation method, the fatigue crack initiation of each specimen was then investigated. The investigation results are as follows. (1) The proportional relationship exists between the maximum stress K iωa at the notch root and logarithm of the number of cycles to fatigue crack initiation N i. (2) Based on the slope of the relationship between the maximum stress K iωa and the number of cycles to fatigue crack initiation N i at the notch root, there is no possibility that the fatigue crack in the same mechanism initiates over N=10 7 cycles. Therefore, the stress amplitude that is not initiated the fatigue crack at N=10 7 cycles is the fatigue limit.

元の言語英語
ホスト出版物のタイトル17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures
ページ937-944
ページ数8
2
出版物ステータス出版済み - 2008
イベント17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17 - Brno, チェコ共和国
継続期間: 9 2 20089 5 2008

その他

その他17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
チェコ共和国
Brno
期間9/2/089/5/08

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Titanium
Fatigue of materials
Crack initiation
Fatigue cracks

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

これを引用

Fujii, T., Hamada, S., & Noguchi, H. (2008). Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium. : 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures (巻 2, pp. 937-944)

Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium. / Fujii, Takumi; Hamada, Shigeru; Noguchi, Hiroshi.

17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures. 巻 2 2008. p. 937-944.

研究成果: 著書/レポートタイプへの貢献会議での発言

Fujii, T, Hamada, S & Noguchi, H 2008, Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium. : 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures. 巻. 2, pp. 937-944, 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17, Brno, チェコ共和国, 9/2/08.
Fujii T, Hamada S, Noguchi H. Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium. : 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures. 巻 2. 2008. p. 937-944
Fujii, Takumi ; Hamada, Shigeru ; Noguchi, Hiroshi. / Proposal of estimation method for notched specimen fatigue limit of commercially pure titanium. 17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures. 巻 2 2008. pp. 937-944
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abstract = "In order to identify the fatigue limit for a sharp notched specimen of commercially pure titanium, rotating bending fatigue tests on smooth and notched specimens were curried out. In previous studies, it was found that the fatigue limit for a sharp notched specimen of commercially pure titanium could not be determined and it is not sure whether it fail over N=10 7 cycles or not. Based on the experimental results, in the smooth specimen and notched specimen (p=1.0mm), they have fatigue limits and knee points, while the sharp notched specimen (p=0.1mm) does not. As an estimation method, the fatigue crack initiation of each specimen was then investigated. The investigation results are as follows. (1) The proportional relationship exists between the maximum stress K iωa at the notch root and logarithm of the number of cycles to fatigue crack initiation N i. (2) Based on the slope of the relationship between the maximum stress K iωa and the number of cycles to fatigue crack initiation N i at the notch root, there is no possibility that the fatigue crack in the same mechanism initiates over N=10 7 cycles. Therefore, the stress amplitude that is not initiated the fatigue crack at N=10 7 cycles is the fatigue limit.",
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