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

Takumi Fujii, Shigeru Hamada, Hiroshi Noguchi

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

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.

本文言語英語
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月 2 20089月 5 2008

その他

その他17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
国/地域チェコ共和国
CityBrno
Period9/2/089/5/08

!!!All Science Journal Classification (ASJC) codes

  • 土木構造工学

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