Quantification of the Fatigue Strength of a Bolt based on Residual Stress at the Thread Root
| Project/Area Number |
20560130
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
HAGIWARA Masaya Nagoya Institute of Technology, 大学院・工学研究科, 准教授 (90134840)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 機械要素 / ねじ / ボルト / 疲労強度 / 残留応力分布 / X線応力測定 / シミュレーション / FEM応力解析 / 残留応力 / FEM解析 / 局所的応力 |
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| Research Abstract |
To predict the fatigue strength of a bolt, and to prevent the failure, it is necessary to know the residual stress induced by thread rolling process precisely. In this study, the X-ray measurement and computer simulation were performed for large-scale thread root model made by rolling. By comparing the results, the model has been proposed to calculate the residual stress distribution. The results from fatigue test show that the fatigue strength of a bolt can be predicted from the local stress distribution obtained by computer analysis using the hypothesis presented.
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Report
(4 results)
Research Products
(17 results)
