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Development of Strength Confirmation Testing Method of Ceramics by Reliability Engineering

Research Project

Project/Area Number 04555028
Research Category

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

Allocation TypeSingle-year Grants
Research Field 材料力学
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, 主管
MATSUMURA Takashi  The University of Electro-Communications, Department of Mechanical and Control E, 電気通信学部, 助手 (00251710)
TAKAMATSU Tohru  The University of Electro-Communications, Department of Mechanical and Control E, 電気通信学部, 講師 (00106890)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥9,100,000 (Direct Cost: ¥9,100,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1992: ¥6,500,000 (Direct Cost: ¥6,500,000)
KeywordsCeramics / Ceramics Bearing / Silicon Nitride / Strength Confirmation Test / Reliability Engineering / セラミック軸受 / 窒化珪素
Research Abstract

The aim of this research is to develop the method of strength confirmation testing of ceramics by the reliability engineering. The principal results of the research are summarized as follows.
1.The mean reliability was applied to the determination of design-allowable stress S_a for the case where the material strength follows a two-parameter Weibull distribution. It was found that for the case when the shape parameter alpha is known and only the scale parameter beta is unknown, the design-allowable stress S_a was obtained analytically and for the case when both alpha and beta are unknown, S_a was obtained numerically.
2.The mean reliability was applied to the estimation of the size of reliability for the case when a design-allowable stress is determined by reliability R and confidence level C.It was found that for the case when the strength follows a normal distribution and Weibull distribution, the mean reliability was obtained analytically or numerically and for the case when the distr … More ibution of strength is unknown, the lower limit of the mean reliability was obtained by the product reliability R by confidence level C regardless of the distribution of strength.
3.The ring crack initiation load was studied for a ceramic ball from a statistical point of view experimentally. The ring crack initiation load P_R was much larger than the static load rating given by the ISO method for steel bearings. The former is about ten times of the latter.
4.Which of the inter-ball variability and the intra-ball variability is responsible for the scatter of the ring crack initiation load P_R of ceramic bearing balls was studied experimentally. It was found that scatter of P_R evaluated by measuring P_R at per single position per ball is mainly due to intra-ball variability or spatial variation of P_R within one ball.
5.The mechanism of crushing fracture of ceramic bearing balls was studied experimentally. It wa found that a radial crack led to final fracture.
6.The rolling fatigue of ceramic bearing balls was studied experimentally. It was found that the rolling fatigue life followed approximately a two-parameter Weibull distribution. Less

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 〓 星仁: "信頼性設計における信頼度と信頼水準の統合の試み" 日本機械学会論文集(A集). 59. 478-482 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 市川 昌弘: "窒化硅素軸受球の転がり疲労特性" 材料(日本材料学会誌). 42. 1406-1411 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Sung-In Bae: "Unification of Reliability and Confidence Level in Reliability-Based Design (The case of Z-Parameter Weibull Distribution)" ISEM International Joural, Series A. 38. 133-137 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masahiro Ichikawa: "Ring Crack Initiation Load of Silicon Nitride Bearing Ball" JSME International Joural, Series A. 38(掲載決定). 226-230 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masahiro Ichikawa: "Intra-Ball and Inter-Ball Variability of Ring Crack Initiation Load of Silicon Nitride Bearing Balls" JSME International Joural, Series A. 38(掲載決定). 231-235 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Sung-In Bae, Masahiro Ichikawa: "An Attempt to Unify Reliability and Confidence Level in Reliability-Based Design (The Case of 2-Parameter Weibull Distribution)" Transactions of the Japan Society Mechanical Engineers, Series A. Vol.59, No.588. 478-482 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Tohru Takamatsu, Takashi Matsuo, Nagatoshi Okabe, Yutaka Abe: "Rolling Fatigue Properties of Silicon Nitride Bearing Balls" Journal of The Society of Materials Science, Japan. Vol.42, No.483. 1406-1411 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Sung-In Bae, Masahiro Ichikawa: "Unification of Reliability and Confidence Level in Reliability-Based Design (The Case of 2-Parameter Weibull Distribution)" JSME International Journal, Series A. Vol.38, No.1. 226-230 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Tohru Takamatsu, Naoki Shinodou, Nagatoshi Okabe, Yutaka Abe: "Ring Crack Initiation Load of Silicon Nitride Bearing Balls" JSME International Journal, Series A. Vol.38, No.2 (decided to run in the journal). 226-230 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masahiro Ichikawa, Tohru Takamatsu, Takashi Matsuo, Nagatoshi Okabe, Yutaka Abe: "Intra-ball and Inter-Ball Variability of ring Crack Initiation Load of silicon Nitride Bearing Balls" JSME International Journal, Series A. Vol.38, No.2 (decided to run in the journal). 231-235 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 市川 昌弘: "窒化硅素軸受球の転がり疲労による剥離の形態(レーザー顕微鏡による観察)" 日本機械学会第72期全国大会講演論文集(I). No.940-30. 226-228 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 市川 昌弘: "窒化硅素軸受球のリングクラック発生荷重の球内変動と球間変動" 日本機械学会材料力学部門講演会講演論文集(Vol.B). No.940-37. 376-377 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Sung-In BAE: "Unification of Reliability and Confidence Level in Reliability-Based Design(The Case of 2-Parameter Weibull Distribution)" ISME International Journal,Series A. 38-1. 133-137 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 市川昌弘: "窒化硅素軸受球の転がり疲労特性" 材料(日本材料学会誌). 42. 1406-1411 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 市川昌弘: "信頼性設計における信頼度と信頼水準の統合の試み" 日本機械学会第3回設計工学・システム部門講演会講演論文集. NO.930-27. 150-154 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 市川昌弘: "窒化硅素軸受球の圧砕強度・転がり疲労寿命と信頼性" 日本機械学会第71期全国大会講演論文集(G). NO.930-63. 43-45 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 市川昌弘: "信頼度と信頼水準を規定した設計応力の決定に関する考察" 日本機械学会平成5年度材料力学部門講演会講演論文集. NO.930-73. 671-674 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 裴 星仁: "信頼性設計における信頼度と信頼水準の統合の試み(強度が2母数ワイブル分布に従う場合)" 日本機械学会論文集(A編). 59. 478-482 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 市川 昌弘: "セラミックス軸受用窒化硅素球のリングクラック発生強度の空間分布" 日本機械学会講演論文集(平成4年度材料力学部門講演会講演論文集). No.920-72. 688-689 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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