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Development of Magnetic Stress Analyzer for Underwater Steel Structure Utilizing the Law of Approach to Saturation Magnetization

Research Project

Project/Area Number 02555126
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionKyoto University

Principal Investigator

KANETA Kiyoshi  Kyoto Univ., Fac. Eng., Prof., 工学部, 教授 (60025830)

Co-Investigator(Kenkyū-buntansha) KONDO Hideaki  Nikkoshi CO., research fellow, 技術開発部, 開発部員
KANEKO Fumio  Nikkoshi CO., chief, 技術開発部, 部長代理
HIROTA Takashi  Nikkoshi CO., Director, 常務取締役
UTSUNOMIYA Tomoaki  Kyoto Univ., Fac. Eng., Res. Assistant., 工学部, 助手 (10211773)
NISHIZAWA Hidekazu  Kyoto Univ., Fac. Eng., Res. Assistant., 工学部, 助手 (70127116)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1991: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1990: ¥4,400,000 (Direct Cost: ¥4,400,000)
KeywordsSaturation magnetization / Magneto-striction / Steel Structure / Under water / Stress measurement
Research Abstract

The purpose of this research project is to develope a magnetic stress analyzer which can be applied for the stress measurement of off-shore or underwater steel structures such as piers and piles. The important features of this system to be developed are as follows.
1)Utilization of the phenomenon of magneto-striction, especially that of the range of saturation magnetization.
2)Utilization of the relationship called 1/H^3 rule. This rule is obtained thoretically, and verified experimentally by our research groupe.
The following research results have been obtained.
1)For the purpose of the evaluation of the performance of the developed system, the testing device enabling the loading of steel specimen set in the water.
2)A water-proof magnetic probe has been developed and has shown us a good performance.
3)A magnetic stress analyzer, which isofully automated by a micro-computer is developed. This system was proved that the output magnetic signal obeys the 1/H^3 rule.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 宇都宮 智昭,西澤 英和,金多 潔,小澤 智広: "飽和磁化漸近則に基づく鋼材の応力測定における炭素および塑性歪の効果" 材料. 40. 832-836 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tomoaki Utsunomiya,Hidekazu Nishizawa,Kiyoshi Kaneta: "Effect of stress on the Law of Approach to Saturation Magnetization in Carbon Steels" IEEE TRANSACTIONS ON MAGNETICS. 27. 3420-3425 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Utsunomiya,H.Nishizawa,K.Kaneta: "Biaxial stress measurement using a magnetic probe based on the law of approach to saturation magnetization" NDT&E INTERNATIONAL. 24. 91-94 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tomoaki Utsunomiya: "Hidekazu Nishizawa, Kiyoshi Kaneta Effect of stress on the Law of Approach to Saturation Magnetization in Carbon Steels." IEEE Transactions on Magnetics. 27. 3420-3425 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tomoaki Utsunomiya: "Hidekazu Nishizawa, Kiyoshi Kaneta Bi-axial stress measurement using a magnetic probe based on the law of approach to saturation magnetization." NDT&T International. 24. 91-94 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tomoaki Utsunomiya, Hidekazu Nishizawa, Kiyoshi Kaneta Tomohiro Ozawa: "Effect of carbon content and plastic strain on the magnetic stressmeasurement of steel based on the Law of Approach to Saturation" Journal of the society of Material. 40. 832-836 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 宇都宮 智昭,西澤 英和,金多 潔,小澤 智広: "飽和磁化漸近則に基づく鋼材の応力測定における炭素および塑性歪の効果" 材料. 40. 832-836 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tomoaki Utsnomiya;Hidekazu Nishizawa;Kiyoshi Kaneta: "Effect of stress on the Law of Approach to Saturation Magnetization in Carbon Steels" IEEE TRANSACTIONS ON MAGNETICS. 27. 3420-3425 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Utsunomiya;H.Nishizawa;K.Keneta: "Biaxial stress measurement using a magnetic probe based on the law of approach to saturation magnetization" NDT&E INTERNATIONAL. 24. 91-94 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 宇都宮 智昭.西沢 英和、金多 潔・小沢 智広: "飽和磁化漸近則に基づく鋼材の応力測定における炭素および塑性ひずみの効果" 材料.

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2017-03-24  

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