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Mesoscopic Modelling of Damage in Composite Materials

Research Project

Project/Area Number 10650094
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionOsaka City University

Principal Investigator

MOTOGI Shinya  Osaka City University, Department of Intelligent Materials Engineering, Professor, 工学部, 教授 (40221626)

Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsDamage / Composite materials / Ultrasonic nondestructive evaluation / Damage mechanics / Constitutive equation / Lamb wave / Random particulate camposites / Interfacial cracking damage / 非破壊評価 / 超音波板波
Research Abstract

In this research, two types of damage are focused on ; one is the transverse cracking damage in FRP crossply laminates, the other is particle-matrix interfacial cracking damage. For the transverse cracking in FRP, obtained results can be summarized as follows :
1) The average stress in cracking layer decreases with development od cracking, and then the constitutive equation of the cracking layer can be described by the so-called work-softening material.
2) The modern plasticity theory can be applied to the cracking layer and the uncracked layer can be regarded as anisotropic elastic material, then these are combined to give a laminate with the aid of lamination theory.
3) Using the above formulation, crack development and degradation of elastic stiffnesses are compared with experiments and give good correspondence.
4) Lamb wave velocity in damaged laminates can be calculated and a comparison with experiment was excellent.
For the interfacial cracking in random particulate composites is suumarized as follows :
1) A release agent can be used as the controller of the interfacial strength in making the material.
2) The stress-strain curve shows large nonlinearity because of development of interfacial cracking damage, and as a result, elongation at failure increases as the interfacial cracking strength decreases.
3) Wave propagation velocities and acoustic anisotropy are caculated and these also agrees well with experimental results.
These results are a base for nondestructive damage evaluation in composite materials, and they contribute to improvement in reliability of composites.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] S.MOTOGI: "Thermal Fatigue Mechanism of Ramdom Particulate Composite"Proc.1^<st> Asia-Australasia Conf.On Comp.Mat.. Vol.II. 731-1-731-4 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.WADA: "Damage Mechanics Approach to Nonlinear Behavior of FRP Laminates with Cracking Layers"Advanced Composite Materials. Vol.8,No.3. 217-234 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 和田明浩: "損傷力学的手法による複合材料積層板の弾性率低下予測"材料. Vol.48,No.5. 454-458 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.WADA: "Damage Mechanics Formulation of the Crack Evolution Process in Composite Laminates under Plane Stress Conditions"J.Reinforced Plastics and Composites. Vol.19,No.3. 219-229 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 和田明浩: "FRP直交積層板の曲げによるき裂損傷発達のモデル化"材料. Vol.49,No.5. 494-501 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.MOTOGI: "Modelling and Ultrasonic Evaluation of Interfacial Cracking Damage in Random Particulate Composites"Proc.2^<nd> Asia-Australasia Conf.On Comp.Mat.. 811-818 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shinya MOTOGI: "Thermal Fatigue Mechanism of Ramdom Particulate Composite"Proc. 1^<st> Asia-Australasia Conf. On Comp.Mat.. Vol.II. 731-1-731-4 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akihiro WADA: "Damage Mechanics Approach to Nonlinear Behavior of FRP Laminates with Cracking Layers"Advanced Composite Materials. Vol.8, No.3. 217-234 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akihiro WADA: "Prediction of Elastic Stiffness Degradation in Composite Laminates using Damage Mechanics"Zairyou. Vol.48, No.5. 454-458 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akihiro WADA: "Damage Mechanics Formulation of the Crack Evolution Process in Composite Laminates under Plane Stress Conditions"J.Reinforced Plastics and Composites. Vol.19, No.3. 219-229 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akihiro WADA: "Modelling of Damage Evolution in Bending of FRP Crossply Laminates"Zairyou. Vol.49, No.5. 494-501 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shinya MOTOGI: "Modelling and Ultrasonic Evaluation of Interfacial Cracking Damage in Random Particulate Composites"Proc. 2^<nd> Asia-Australasia Conf.On Comp.Mat.. 811-818 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Motogi & T.Motoyama: "Modelling and Ultrasonic Evaluation of Interfacial Cracking Damage in Random Particulate Composites"Proc.2nd Asian-Australasian Conf.Composite Materials (ACCM-2000). Vol.II. 1179-1184 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 和田明浩,元木信弥: "FRP直交積層板の曲げによる裂損傷発達過程のモデル化"材料. Vol.49,No.5. 494-501 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 和田明浩,元木信弥: "FRP積層板の超音波伝播特性に与えるマトリックスき裂の影響"第30回FRPシンポジウム講演論文集. 63-66 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 元木信弥、元山貴晴 他: "粒子分散複合材料の界面き裂損傷の発達と超音波による非破壊評価"第29回FRPシンポジウム講演論文集. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 元木信弥、元山貴晴: "粒子分散複合材料の損傷による音響複屈折"第28回機械学会関西支部大会講演論文集. 8・19-8・20 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 和田 明浩、元木 信弥 他: "損傷力学的手法による複合材料積層板の弾性率低下の予測"材料. 48, 5. 454-458 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Wada, S.Motogi et al.,: "Damage Mechanics Approach to Nolinear behavior of FRP Laminates with Cracking Layers"Advanced Composite Materials. 8, 3. 217-234 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] A.Wada, S.Motogi et al.,: "Damage Mechanics Formulation of Crack Evolution Process in Composite Laminates under Plane Stress Condition"J. Reinforced Plastics and Composites. (in printing). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 元木信弥、元山貴晴 他: "粒子分散複合材料における界面き裂損傷の超音波による評価" 第7回複合材料界面シンポジウム講演論文集. 発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 元木信弥、元山貴晴 他: "超音波による粒子分散複合材料の損傷評価" 第28回FRPシンポジウム講演論文集. 発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 和田明浩、元木信弥 他: "損傷力学的手法による複合材料積層板の弾性率低下の予測" 材料. 48,5 印刷中. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Wada,S.Motogi et al.,: "Damage Mechanics Formulation of Transverse Cracking of Crossply Laminates in Bending" Proc.1st Asian-Australasian Conf.Composite Materials. Vol.II. 731-1-731-4 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] S.Motogi,T.Fukuda: "Thermal Fatigue Mechanism of Random Particulate Composites" Proc.1st Asian-Australasian Conf.Composite Materials. Vol.II. 726-1-726-2 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Wada,S.Motogi et al.,: "Damage Mechanics Formulation of Crack Evolution Process in Composite Laminates under Plane Stress Condition" J.Reinforced Plastics and Composites. in printing. (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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