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Study on Design of Fibrous Composite Materials Based on Stochastic Materials Design

Research Project

Project/Area Number 04650098
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionOsaka Institure of Technology

Principal Investigator

NAKAYASU Hidetoshi  Osaka Institure of Technology, Department of Industrial Management, Professor, 工学部, 教授 (80142553)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsfiber reinforced composites materials / stochastic materials design / reliability engineering / failure probability / simulator of failure / safety index / lamination configuration / sequential failure path / 線維強化複合材料積層板 / 多層積層板 / 標準化変換 / 信頼性工学 / 繊維強化複合材料積層板 / 破損則 / 一方向積層板 / パラメータセンシティビィティ / 繊維配向角 / 信頼性設計
Research Abstract

Studies of stochastic materials design of composite materials have been performed. For these purpose, design-oriented failure criteria of composite materials are applied to construct an evaluation model of probabilistiv safety based on the extended structural reliability theory. A new design diagra which shows the feasible region on in-plane strain space corresponding to the safety index or failure probability is also proposed. These stochastic failure envelop diagrams which are illustrated onto in-plane strain space enables one to evaluate the stochastic behavior of the composite laminate with any lamination orientation under multi-axial stress or strain condition. The sequential failure path of each layr of composite laminates in simulated by means of modulus degradation and safety Indies under the offaxis load conditions. From the simulation analysis, a typical failure path is evaluated corresponding to an in-plane strain vector. The mechanical behavior, such as decreasing modulus and increasing in-plane strain are also simulated in correspondence with each stage of sequential ply failure. It is necessary to select the important failure path whose occurrence probabilities are greater than others, since there are too many failure paths of multi-layr composite laminate evaluate. The proposed methods of selecting effective failure paths depends upon the heuristic procedure based on one branch and bound rule or selecting effective failure paths depends upon the heuristic procedure based on one branch and bound rule or genetic algorithm which enable one to estimate the effective failure path whose occurrence probabilities are greater. An extended study is performed in order to calculate the failure probability of multiple layr laminates resulting from the effective failure path, some examination for determination of lamination configuration under strength constraints was tried.

Report

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

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Nakayasu Z.Maekawa: "A Comparative Study of Failure Criteria in Probabilistic Fields and Stochastic Failure Envelopes of Composite Materials" Proc.ASME OMAE'92(11th Offshore Mechanics and Artic Engineering Conference),ASME. 92.1304-1-8 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Guoqiang,H.Nakayasu T.Ui: "An Algorithm for Solving Middle-Large-Scale Multi-Objective Planning with a Personal Computer" Proc.1992 Pacific Conference on Manufacturing. 666-673 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Nakanishi H.Nakayasu: "Uncertainty of Safety Index on Structural Safety" IFIP Transactions B-12. B-12. 189-196 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakayasu: "Stochastic Materials Design of Fibrous Composite Laminates" Proc.IUTAM Symposium on Probabilistic Structural Mechanics. (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakayasu, Z.Maekawa: "A Comparative Study of Failure Criteria in Probabilistic Field and Stochastic Failure Envelopes of Composite Meterials" Proc. ASME OMAE '92 (11th Offshore mechanics and Artic Engineering Conference), ASME. 92/1304. 1-8 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] G.sun, H.Nakayasu, T.Ui: "An Algorithm for Solving Middle-Large-Scale Multi-Objective Planning with a Personal Computer" Proc.1992 Pacific Conference on Manufacturing. 666-673 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Nakanishi, H.Nakayasu: "Uncertainty of Safety Index on Structural Safety" IFIP Transaction. B-12. 189-196 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakayasu: "Stochastic Materials Design of Fibrous composite Laminates" Proc. IUTAM Symposium on Probabilistic Structural Mechanics. (in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] S.Nakanishi H.Nakayasu: "Uncertainties of Safety Index on Structural Safety" IFIP Transactions B-12. B-12. 189-196 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Nakayasu: "Stochastic Materials Design of Fibrous Composite Laminates" Proc.IUTAM Symposium on Probabilistic Structural Mechanics. (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Nakayasu,Z.Maekawa: "A Comparative Study of Failure Criteria in Probabilistic Fields and Stochastic Failure Envelopes of Composite Materials" Proc. OMAE'92 (11th Offshore Mechanics and Artic Engineering Conference), ASME. 92-1304-1-92-1304-8 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Guoqiang,H.Nakayasu,T.Ui: "An Algorithm for Soluing Middle-Large-Scale Multi-Objective Planning with a Personal Computer" Proc. 1992 Pacific Conference on Manufacturing. 666-673 (1992)

    • Related Report
      1992 Annual Research Report

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

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