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Study on Electromagnetic Fracture Mechanics of Material Systems for New Electromagnetic Devices

Research Project

Project/Area Number 08455049
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SHINDO Yasuhide  Tohoku Univ., Graduate School of Engineering Professor, 大学院・工学研究科, 教授 (90111252)

Co-Investigator(Kenkyū-buntansha) HORIGUCHI Katsumi  Tohoku Univ., Graduate School of Engineering Research Associate, 大学院・工学研究科, 助手 (30219224)
UEDA Sei  Tohoku Univ., Graduate School of Engineering Associate Professor, 大学院・工学研究科, 助教授 (10176589)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1996: ¥4,900,000 (Direct Cost: ¥4,900,000)
KeywordsElasticity / Electromagnetic Fracture Mechanics / Integral Transforms / Finite Element Analysis / Material Testing / Electromagnetic Material / Electromagneto-Elastic Interaction / Fracture Toughness / 導電性・磁性材料 / 圧電セラミックス / 破壊靱性 / 強電磁場 / 超伝導応用機器 / 電子・電気機械デバイス / 圧電積層材料
Research Abstract

Design and development of new electromagnetic devices require basic research on electromagnetic fracture mechanics. In this research project, the electromagnetic fracture mechanics of material systems is investigated. From the theoretical considerations and experimental results for electromagnetic material systems, the following can be concluded
1) (a) We consider the scattering of time harmonic flexural waves by a through crack in a conducting plate under a uniform magnetic field normal to the crack surface for two special cases, perfect conductivity and quasistatic electromagnetic field, which are of physical interest. The dynamic moment intensity factor versus frequency is computed and the influence of the magnetic field and the angle of incidence on the normalized values is displayed graphically.
(b) We discuss the magneto-elastic interactions and singular moments in a soft ferromagnetic plate with a through crack under a uniform magnetic field normal to the plate surface. The static … More and dynamic moment intensity factors are computed and the influence of the magnetic field on the normalized values is displayed graphically.
2) We examine the bending of a soft ferromagnetic beam plate in a transverse magnetic field both theoretically and experimentally. The effect of magnetic field on the deflection and strain is shown graphically. A comparison of the deflection and strain is made between theory and experiment, and the agreement is good for the magnetic field considered. We also study the effect of magnetic field on the fracture behavior of a soft ferromagnetic beam plate.
3) We consider the cryogenic fracture behavior of structural alloys and weldments for superconductiong fusion magnets in high magnetic fields both analytically and experimentally.
4) (a) We consider the static and dynamic problems of cracked piezoelectric materials and composites. Numerical calculations are carried out, and the stress intensity factor, energy release rate and crack growth rate are obtained. We also study the static behavior of the elastic and electric variables in the vicinity of a surface electrode attached to a piezoelectric ceramic.
(b) We discuss the scattering of normally incident longitudinal waves by a finite crack in an infinite isotropic dielectric body under a uniform electric field. The dynamic stress intensity factor versus frequency is computed and the influence of the electric field on the normalized values is displayed graphically.
5) (a) We perform the bending tests on piezoelectric material systems and examine the piezoelectric effects on the deflection. We also employ the finite element analysis to study the electromechanical behavior of piezoelectric material systems. Numerical results are compared with the experimentally measured response.
(b) We carry out the Vickers indentation tests on piezoelectric materials and examine the influence of applied electric field, polarization and load on the fracture toughness. The specimen fracture behavior is also simulated numerically using the finite element technique. Numerical results are provided to illustrate both qualitative and quantitative behavior of the induced electromechanical fields.
6) We performe the numerical simulation for analyzing the electromagnetic fracture and deformation of material systems. The predictions obtained from the simulation correlate very well with the experiments. Less

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Y.Shindo: "Dynamic Stress Intensity Factor of a Cracked Dielectric Medium in a Uniform Electric Field" Acta Mechanica. 117-1/4. 1-10 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Singular Stress and Electric Fields of a Piezoelectric Ceramic Strip with a Finite Crack under Longitudinal Shear" Acta Mechanica. 120-1/4. 31-45 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Scattering of Oblique Flexural Waves by a Through Crack in a Conducting Mindlin Plate in a Uniform Magnetic Field" International Journal of Solids and Structures. 35-17. 2183-2203 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Scattering of Flexural Waves by a Through Crack in a Soft Ferromagnetic Plate in a Uniform Magnetic Field" Theoretical and Applied Mechanics. 47. 135-146 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] F.Narita: "Anti-Plane Shear Crack Growth Rate of Piezoelectric Ceramic Body with Finite Width" Theoretical and Applied Fracture Mechanics. 30-2. 127-132 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 堀口勝三: "磁場内におけるフェライト系ステンレス鋼平板の曲げ試験と磁気弾性解析" 日本機械学会論文集,A偏. 64-621. 1296-1301 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Dynamic Stress Intensity Factor of a Cracked Dielectric Medium in a Uniform Electric Field" Acta Mechanica. 117-1/4. 1-10 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Singular Stress and Electric Fields of a Piezoelectric Ceramic Strip with a Finite Crack under Longitudinal Shear" Acta Mechanica. 120-1/4. 31-45 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Scattering of Oblique Flexural Waves by a Through Crack in a Conducting Mindlin Plate in a Uniform Magnetic Field" International Journal of Solids and Structures. 35-17. 2183-2203 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "Scattering of Flexural Waves by a Through Crack in a Soft Ferromagnetic Plate in a Uniform Magnetic Field" Theoretical and Applied Mechanics. 47. 135-146 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] F.Narita: "Anti-Plane Shear Crack Growth Rate of Piezoelectric Ceramic Body with Finite Width" Theoretical and Applied Fracture Mechanics. 30-2. 127-132 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Horiguchi: "Bending Tests and Magneto-Elastic Analysis of Ferritic Stainless Steel Plate in a Magnetic Field" Trans.JSME (A). 64-621. 1296-1301 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Shindo: "The Scattering of Oblique Flexural Waves of a Cracked Conducting Plate in a Uniform Magnetic Field" Acta Mechanica. 128-1/2. 15-27 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Electroelastic Analysis of Piezoelectric Ceramics with Surface Electrodes" International Journal of Engineering Science. 36-9. 1001-1009 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Scattering of Flexural Waves by a Through Crack in a Soft Ferromagnetic Plate in a Uniform Magnetic Field" Theoretical and Applied Mechanics. 47. 135-146 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Magneto-Elastic Analysis of a Soft Ferromagnetic Plate with a Through Crack under Bending" International Journal of Engineering Science(in press).

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Impact Response of a Finite Crack in an Orthotropic Piezoelectric Ceramic" Acta Mechanica. (in press).

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Dynamic Singular Moments in a Perfectly Conducting Mindlin Plate with a Through Crack under a Magnetic Field" ASME Journal of Applied Mechanics. (in press).

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Shindo: "Singular stress and Electric Fields of a Piezoelectric Ceramic Strip with a Finite Crack Under Longitudinal Shear" Acta Mechaica. 120-1/4. 31-45 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Shindo: "Bending of a Symmetric Piezothermoelastic Laminated Plate with a Though Crack" Archives of Mechanics. 49-2. 403-412 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Shindo: "Flexural Wave Scattering at a Through Crack in a Conducting Plate Under a Uniform Magnetic Field" ASME Journal of Applied Mechaics. 64-4. 828-834 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 堀口 勝三: "磁場内におけるフェライト系ステンレス鋼平板の曲げ試験と磁気弾性解析" 日本機械学会論文集,A編. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Shindo: "Scattering of Oblique Flexural Waves by a Through Crack in a Conducting Mindine Plate in a Uniform Magnetic Field" International Journal of Solids and Structures. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Shindo: "Dynamic Bending of a Symmetric Piezoelectric Laminated Plate with a Through Crack" Theoretical and Applied Fracture Mechanics. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Y. Shindo: "Electroelastic intensification near anti-plane shear crack in orthotropic piezoelectric ceramic strip" Theoretical and Applied Fracture Mechanics. 25. 65-71 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y. Shindo: "Dynamic stress intensity factor of a cracked dielectric medium in a uniform electric field" Acta Mechanic. 117. 1-10 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 池田 雅俊: "圧電セラミックス平板の曲げ試験と電気弾性解析" 第8回「電磁力関連のダイナミッククス」シンポジウム講演論文集. 95-252. 47-52 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 進藤 裕英: "材料システムの電磁弾性相互干渉" 第8回「電磁力関連のダイナミッククス」シンポジウム講演論文集. 95-252. 203-208 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 堀口 勝三: "磁場内におけるフェライト系ステンレス鋼平板の曲げ試験と磁気弾性解析" 第8回「電磁力関連のダイナミッククス」シンポジウム講演論文集. 95-252. 221-226 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 進藤 裕英: "貫通き裂を有する対称圧電積層板のたわみ波散乱" 日本機会学会東北支部八戸地方講演会講演論文集. 961-2. 14-16 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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