ダイカスト材の三次元弾性応力集中係数に及ぼす鋳巣問相互作用の影響

• Material Type: 文書・図像類
• Title: ダイカスト材の三次元弾性応力集中係数に及ぼす鋳巣問相互作用の影響
• Author/Editor: 桑水流, 理; BIDHAR, Sujit; 矢野, 貴之; 半谷, 禎彦; 宇都宮, 登雄; 吉川, 暢宏; KUWAZURU, Osamu; YANO, Takayuki; HANGAI, Yoshihiko; UTSUNOMIYA, Takao; YOSHIKAWA, Nobuhiro
• Author Heading: 桑水流, 理; BIDHAR, Sujit; 矢野, 貴之; 半谷, 禎彦; 宇都宮, 登雄; 吉川, 暢宏; KUWAZURU, Osamu; YANO, Takayuki; HANGAI, Yoshihiko; UTSUNOMIYA, Takao; YOSHIKAWA, Nobuhiro
• Publication, Distribution, etc.: 日本鋳造工学会
• Publication Date: 2012-08
• Publication Date (W3CDTF): 2012-08
• Alternative Title: Effects of Dual-Pore Interaction on Three-Dimensional Elastic Stress Concentration Factor for Die Castings
• Periodical title: 鋳造工学
• No. or year of volume/issue: 82 8
• Volume: 82
• Issue: 8
• Pages: 472-477
• ISSN (Periodical Title): ISSN : 1342-0429
• Text Language Code: jpn
• Subject Heading: casting defect; aluminum; alloy; die castlng; stress concentration; fatigue; finite element method
• Target Audience: 一般
• Note (General): The porosity of die cast aluminum alloy significantly affects its fatigue strength. However,the stress intensity around macroscopic pores is occasionally mitigated by its large curvature,so the maximum pore is not always guaranteed to be of af atigue crack origin. Moreover,die cast materials include a large number of pores,therefore there is a need to consider the interaction of pores as well as the size of each pore. For macroscopic pores,we have proposed a methodology to evaluate the effect of pores on the fatigue strength by means of the stress concentration factor.In this study,as the first step to evaluate the stress enhancement around internal clustered pores,an empirical formulation of the elastic stress concentration factor around dual-pore was obtained from the numerical results of the three-dimensional finite element linear elastic analysis.Two spherical pores of the same radius ln the middle of as ufficiently large region were considered to ellminate the effects of the outer surface. Uniform tensile stress was applied to the boundary of the analysis domain,and the stress concentration factor was evaluated as the ratio of the maximum principal stress to the applied nominal stress. The inter-pore distance and loading angle were systematically changed,and the variation of stress concentration factor was obtained numerically. After the selection of suitable function form for stress concentration factor prediction,the optimum coefficients were determined by least-square fitting to the numerical results,and its validity and availability were discussed from a mechanical standpoint
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ