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Development of Optimum Proof Testing Method of Structural Ceramics

Research Project

Project/Area Number 01850021
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 機械材料工学
Research InstitutionThe University of Electro-Communications

Principal Investigator

ICHIKAWA Masahiro  The University of Electro-Communications, Department of Mechanical and Control Engineering Professor, 電気通信学部, 教授 (80017334)

Co-Investigator(Kenkyū-buntansha) OKABE Nagatoshi  Toshiba Corporation, Heavy Apparatus Engineering Laboratory Chief Researcher, 重電技術研究所, 主幹
TAKAMATSU Tohru  The University of Electro-Communications, Department of Mechanical and Control E, 電気通信学部, 助手 (00106890)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1991: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1990: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1989: ¥3,300,000 (Direct Cost: ¥3,300,000)
KeywordsFine Ceramics / Structural Ceramics / Proof Test / Reliability / 信頼性 / ファインセミラックス
Research Abstract

The aim of this research is to develop the optimum method of proof testing of structural ceramics. The optimum method implies such a method by which the highest probability of surviving proof testing is attained under the condition that S_<fmin>*S_d, where S_<fmin> is the minimum strength after proof testing and S_d is the required strength. The principal results of the research are summarized as follows.
1. The optimum proof testing method was first studied for the case of uniform stress distribution. It was found that the optimum testing method is to use the maximum unloading rate available and the test load which satisfies S_<fmin>=S_d under this unloading rate.
2. The optimum proof testing method was then studied for the case of non-uniform stress distribution. This case Is Important as real machine components are generally subjected to non-uniformly distributed stresses. It was found that the optimum testing method is to use the maximum unloading rate available and the test load whi … More ch satisfies S_<fmin>=S_d at the point of the maximum stress in the component.
3. The influence of the K-V relation on the effect of proof testing was studied by means of computer simulation, where K is the stress intensity factor and V=da/dt is the stable crack growth rate. It was found that when the unloading rate is larger than the critical unloading rate, exterpolation of the first region's K-V relation to the second and third regions does not result in substantial error in calculation of the minimum strength after proof testing and the probability of surviving the proof test.
4. A method for estimating the critical unloading rate was proposed, and the usefulness of this method was demonstrated experimentally.
5. For application of proof testing to ceramic bearing balls, the statistical properties of the ring crack initiation strength and the final fracture strength under crushing load were clarified experimentally. Furthermore, a probabilistic theory for interpreting the experimental results was proposed.
6. Proof testing of Si_3N_4 bearing balls was conducted and importance of unloading rate was demonstrated experimentally. Less

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 市川 昌弘: "セラミックス軸受用窒化硅素球の圧砕強度の球径依存性" 材料(日本材料学会誌). 40. 1348-1354 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: "セラミックス軸受用窒化硅素球の圧砕強度の確率特性" 材料(日本材料学会誌). 40. 1355-1360 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: 材料(日本材料学会誌).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: "セラミックスのプル-フテストの最適試験条件" 日本機械学会論文集(A編).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: "セラミックスのプル-フテストの最適試験条件(応力分布が不均一な場合)" 日本機械学会論文集(A編).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: "セラミックスのプル-フテスト効果に対する安定き裂進展特性の影響" 日本機械学会論文集(A編).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Nagatoshi Okabe, Yutaka Abe: "Size Dependence of Crushing Strength of Si_3N_4 Balls for Ceramic Bearings" Journal of The Society of Materials Science, Japan. 40, No. 457. 1348-1354 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Tohru Takamatsu, Nagatoshi Okabe, Yutaka Abe: "Statistical Properties of Crushing Strength of Si_3N_4 Balls for Ceramic Bearings" Journal of The Society of Materials Science, Japan. 40, No. 457. 1355-1360 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Nagatoshi Okabe, Yutaka Abe: "Consideration of Statistical Treatment of Crushing Test Results of Ceramic Bearing Balls" Journal of The Society of Materials Science, Japan.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa: "Optimum Condition of Proof Testing of Ceramics" Trans. JSME (Ser. A).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa: "Optimum Condition of Proof Testing of Ceramics (The Case of Non-uniform Stress Distribution)" Trans. JSME (Ser. A).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Tohru Takamatsu, Naoki Shindoh: "Influence of Crack Growth Characteristics on Effects of Proof Testing of Ceramics" Trans. JSME (Ser. A).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 市川 昌弘: "セラミックス軸受用窒化硅素球の圧砕強度の球径依存性" 材料(日本材料学会誌). 40. 1348-1354 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックス軸受用窒化硅素球の圧砕強度の確率特性" 材料(日本材料学会誌). 40. 1355-1360 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックス軸受球の圧砕試験結果の統計的取扱いに関する考察" 材料(日本材料学会誌).

    • Related Report
      1991 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックスのプル-フテストの最適試験条件" 日本機械学会論文集(A編).

    • Related Report
      1991 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックスのプル-フテストの最適試験条件(応力分布が不均一な場合)" 日本機械学会論文集(A編).

    • Related Report
      1991 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックスのプル-フテスト効果に対する安定き裂進展特性の影響" 日本機械学会論文集(A編).

    • Related Report
      1991 Annual Research Report
  • [Publications] 進藤 直紀,市川 昌弘,高松 徹: "セラミックスの保証試験効果に対するき裂進展特性の影響" 日本機械学会第68期全国大会講演会講演論文集. NO.900ー59ーA. 200-202 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 市川 昌弘,岡部 永年,阿部 豊: "セラミックス軸受用窒化硅素球の圧砕強度の球径依存性" 材料(日本材料学会誌).

    • Related Report
      1990 Annual Research Report
  • [Publications] 市川 昌弘,高松 徹,岡部 永年,阿部 豊: "セラミックス軸受用窒化硅素球の圧砕強度の確率特性" 材料(日本材料学会誌).

    • Related Report
      1990 Annual Research Report
  • [Publications] 市川昌弘: "セラミックスの保証試験に対する二、三の考察" 日本機械学会第67期通常総会講演会講演論文集. A. 156-158 (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2019-02-15  

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