| Project/Area Number |
18K03855
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
Ueda Sei 大阪工業大学, 工学部, 教授 (10176589)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 圧電材料 / 傾斜機能材料 / 破壊力学 / 弾性数理解析 / 電気的負荷 / 傾斜機能圧電平板 / 特異応力 |
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| Outline of Final Research Achievements |
The fracture problems of a functionally graded piezoelectric material strip (FGPM strip) containing a crack perpendicular to the interface between the FGPM strip and a homogeneous layer under a thermal shock load, an electric load and a mechanical impact load are considered. By using the superposition technique and the Laplace-Fourier transforms techniques, the thermo-electro-mechanical fracture problem is reduced to a singular integral equation, which is solved numerically. The stress intensity factors are computed and presented for the various values of the nonhomogeneous and geometric parameters.
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| Academic Significance and Societal Importance of the Research Achievements |
圧電アクチュエータをモデル化した複雑な組成・形状を有する傾斜機能圧電積層厚板に存在するき裂の熱衝撃応答、電気負荷応答および衝撃応答を厳密に理論解析し、応力拡大係数に及ぼす材料不均質性および幾何学的形状の影響を明らかにした．これらの研究成果は，圧電アクチュエータ中のき裂発生メカニズムを解明し，その強度評価ならびに機能評価の指針となる。すなわち，今後の発展が期待されている圧電アクチュエータの開発・設計上有益な知見を与えるものであるとともに、弾性数理解析の学問分野の確立に寄与するものである。
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