| Project/Area Number |
26820015
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Numazu National College of Technology |
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Principal Investigator |
MATSUDA Shinya 沼津工業高等専門学校, 機械工学科, 准教授 (10550460)
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| Research Collaborator |
NAKADA TAKESHI
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | セラミック球 / 熱衝撃破壊 / リングクラック / 破壊力学 / 強度信頼性 / 製造欠陥 / 応力拡大係数 / 仮想等価き裂長さ / FEM解析 / 1本のき裂発生 / き裂の分岐 / 温度差のばらつき / 寸法効果 / 臨界温度差 / リングクラック発生強度 / ばらつき |
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| Outline of Final Research Achievements |
Strength reliability to contact failure and macroscopic fracture (i.e. thermal shock fracture) of silicon nitride ceramic ball subjected to a single thermal shock load was estimated. First, water-quench test was conducted to obtain thermal shock fracture data. Second, spherical indentation test was conducted for the non-macro cracked fracture ceramic ball after thermal shock to obtain ring crack initiation data. The thermal shock fracture and the ring crack initiation mechanisms were characterized through fracture surface observation and fracture mechanics approach. Finally, strength estimation models to the thermal shock fracture and the ring crack initiation were proposed, respectively.
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