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Development of a Damage-Fracture Simulation System for Stregth and Life-Time Evaluation of Structures

Research Project

Project/Area Number 07555346
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Materials/Mechanics of materials
Research InstitutionNagoya University

Principal Investigator

MURAKAMI Sumio  Nagoya University, Department of Mechanical Engineering, Professor, 工学部, 教授 (10023053)

Co-Investigator(Kenkyū-buntansha) WATANABE Takayuki  CRC Research Institute, Inc., Structural Engineering Department, Manager, 構造技術部, 部長
SUGITA Yuji  Chubu Electric Power Company, Inc., Electric Power Research and Development Cent, 電力技術研究所, 主幹研究員
TOKUDA Masataka  Mie University, Department of Mechanical Engineering, Professor, 工学部, 教授 (90023233)
LIU Yan  Nagoya University, Department of Mechanical Engineering, Assistant Professor, 工学研究科, 助手 (10262859)
TANAKA Eiichi  Nagoya University, Department of Mechanical Engineering, Professor, 工学研究科, 教授 (00111831)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1997: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1996: ¥4,200,000 (Direct Cost: ¥4,200,000)
KeywordsSimulation / Damage / Fracture / Structure / Crack Growth / Life-Time Prediction / Damage Mechanics / Finite Element Method
Research Abstract

The present project aims at the development of a systematic and unified computational technique for fracture and life-time prediction of structural elements by means of Continuum Damage Mechanics (CDM) and Finite Element Method (FEM). By simulating a crack by an aggregate of fractured finite elements, the whole process of damage, crack growth and final fracture can be analyzed. The major results of the present project are summarized as follows :
1. A simulation system of damage and fracture process was developed by incorporating damage evolution equation and inelastic constitutive equations into commercial Finite Element Program and by modeling a crack by an aggregate of fractured finite elements.
2. In order to establish a system of creep crack growth in structural components at elevated temperature, the causes of mesh-dependence of the numerical results are discussed. The effects of stress sensitivity of the damage evolution equation and those of the preceding damage field on the stress singularity at the crack-tip were elucidated.
3. A damage evolution equation for fatigue was formulated by the use of the experimental results of SA508 pressure vessel steel for nuclear reactors, and a fatigue damaged process of notched specimens was analyzed.
4. In order to establish a more systematic framework of damage evolution equations, an elastic-plastic-damage theory was developed on the basis of Gibbs thermodynamic potential.
5. By analyzing the effect of the preceding damage field on the stress singularity at a crack-tip, the condition for the crack-tip stress field to be non-singular was discussed. This analysis elucidated the mathematical structure of the mesh-dependence observed in the damage and fracture simulation method based on CDM and FEM.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (41 results)

All Other

All Publications (41 results)

  • [Publications] 神谷 邦夫: "弾塑性-損傷材料に対する熱力学理論と応力空間における損傷発展式の定式化" 材料. 45・8. 893-900 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S. Murakami: "Local Approach of Fracture Based on Continuum Damage Mechanics and Related Problems" Materials Science Research International. 2・3. 131-142 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村上 澄男: "原子炉圧力容器鋼の照射ぜい化のモデル化" 材料. 46・2. 124-130 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S. Murakami: "Constitutive and Damage Evolution Equations of Elestic-Brittle Materials Based on Irrevessille Thermodynamics" Intenatimal Journal of Mechanical Sciences. 39・4. 473-486 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 劉彦: "損傷の局所化に対する検討と新しいクリープ損傷理論の提案" 日本機械学会論文集,A編. 63・609. 968-975 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 劉彦: "多結晶金属材料のクリープ損傷発展に対するヴォロノイシミュレーション" 日本機械学会論文集,A編. 63・612. 1730-1736 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 劉彦: "モードIIIき裂の弾性応力特異性に対するき裂先端損傷場の影響" 日本機械学会論文集,A編. 63・614. 2084-2091 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N. Maeda: "Fundamentel Study on Applications of Damage Mechanics to Evalultion of Mdtevial Degradation" Nuclear Engineering and Design. 167. 69-76 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K. Hayakawa: "Thermodynamical Modeling of Elastic-Plastic Damage and Experinmental Validation of Damage Potential" International Jouemal of Damage Mechanics. 6・4. 333-363 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Sugita: "Characterization of Mechanical Properties of Aluminized CoCrY Coatings in Advanced Gas Turkine Blades Using a Imall Purch tuting Noded" Proceeding the International Gas Turbine and Aeraengine Congress and Exhibition. 97-GT-532. 1-7 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Ito: "Characterization of Mechanical Properties of Aluminized Coating in Advanced Gas Turkine Blade" Proceedings of International Conference on Power Engineering. 2. 119-123 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hayakawa: "An Iveversible Thermodymamics Theory for Elastis-Plastic-Damage Materials" European Joienal of Mechanics,A/Solids. 17・1. 13-32 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Liu: "Damage Localization of Conventioral Creep Damage Models and Propasition of a New Model for Creep Damage Analysis" JSME International Jouenal,Series A. 41・1. 57-65 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Liu: "Creep Fracture Modeling by Use of Contivuum Damage Variable Based on Voronoi Simulation of Grain Boundary Cavbity" International Jouenal of Mechanical Sciences. 40・2-3. 147-158 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 劉彦: "非線形硬化損傷材料におけるモードIき裂の漸近応力場" 日本機械学会論文集,A編. 64(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Murakami: "Damage Evolution and Damage Surface of An Elestic-Plastic-Damage Material Under Multiaxial Loading" International Jornal of Damage Mechonics. 7(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 田中 英一: "超塑性構成式の精密化と多軸応力状態への拡張" 日本機械学会論文集,A編. 64(印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Murakami, Y.Liu: "Local Approach of Fracture Based on Continuum Damage Mechanics and Related Problems" Materials Science Research International. vol.2, No.3 (September). 131-142 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Murakami, K.Kamiya: "Constitutive and Damage Evolution Equations of Elastic-Brittle Materials Based on Irreversible Thermodynamics" International Journal of Mechanical Sciences. Vol.39, No.4 (August). 473-486 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] N.Maeda, T.Watanabe, M.Yoshino, W.W.Gu: "Fundamental Study on Applications of Damage Mechanics to Evaluation of Material Degradation" Nuclear Engineering and Design. Vol.167. 69-76 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hayakawa, S.Murakami: "Thermodynamical Modeling of Elastic-Plastic Damage and Experiemental Validation of Damage Potential" International Journal of Damage Mechanics. Vol.6, No.4 (October). 333-363 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Sugita, A.Ito, S.Sakurai, T.E.Bloomer, J.Kameda: "Characterization of Mechanical Properties of Aluminized CoCrAlY Coatings in Advanced Gas Turbine Blades Using a Small Punch Testing Method" Preprint of International Gas Turbine and Aeroengine Congress and Exhibition, ASME (June 1997). 97-GT-532. 1-7

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Ito, Y.Sugita, S.Sakurai, T.E.Bloomer, J.Kameda: "Characterization of Mechanical Properties of Aluminized Coatings in Advanced Gas Turbine Blades" Proceedings of International Conference on Power Engineering. Vol.2, JSME (July). 119-123 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Hayakawa, S.Murakami, Y.Liu: "An Irreversible Thermodynamics Theory for Elastic-Plastic-Damage Materials" European Journal of Mechanics, A/Solids. Vol.17, No.1 (January). 13-32 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Liu, S.Murakami: "Damage Localization of Conventional Creep Damage Models and Proposition of a New Model for Creep Damage Analysis" JSME International Journal, Series A. Vol.41, No.1 (January). 57-65 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Liu, Y.Kageyama, S.Murakami: "Creep Fracture Modeling by Use of Continuum Damage Variable Based on Voronoi Simulation of Grain Boundary Cavity" International Journal of Mechanical Sciences. Vol.40, No.2-3 (February). 147-158 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Murakami, K.Hayakawa, Y.Liu: "Damage Evolution and Damage Surface of An Elastic-Plastic-Damage Material Under Multiaxial Loading" International Jounal of Damage Mechanics. Vol.7 (in printing). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Murakami: "Constitutine and Damage Evolution Equations of Elastic-Brittle Materials Based on Irreversible Thermodynamics" International Journal of Mechanical Sciences. 39・4. 473-486 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 劉 彦: "損傷の局所化に対する検討と新しいクリープ損傷理論の提案" 日本機械学会論文集,A編. 63・609. 968-975 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 劉 彦: "多結晶金属材料のクリープ損傷発展に対するヴォロノイシミュレーション" 日本機械学会論文集,A編. 63・612. 1730-1736 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hayakawa: "Thermodynamical Modeling of Elastic-Plastic Damage and Experimental Vabidation of Damage Potential" International Journal of Damage Mechanics. 6・4. 333-363 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 劉 彦: "モードIIIき裂の弾性応力特異性に対するき裂先端損傷場の影響" 日本機械学会論文集,A編. 63・614. 2084-2091 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Liu: "Creep Fracture Modeling by Use of Continuum Damage Variable Based on Voronoi Simulation of Grain Boundary Canity" International Journal of Mechanical Sciences. 40・2/3. 147-158 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Liu: "Creep Crack Growth Analysis by Use of a Local Approach Incorporating Perfect Plasticity." Proc.Int.Conf.on Creep and Fatigue. Mech.Eng.Publ.331-340 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 神谷邦夫: "弾塑性-損傷材料のモデル化に対する実験的検討-多軸組合せ負荷における損傷面の検討-" 材料. 45・6. 667-674 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 神谷邦夫: "弾塑性-損傷材料に対する熱力学理論と応力空間における損傷発展式の定式化" 材料. 45・8. 893-900 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Murakami: "Local Approach of Fracture Bosed on Continuum Damage Mechanics and the Related Problems" Material Science Research Internaitonal. 2・3. 131-142 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Liu: "Creep Fracture Modeling by Continuum Damage Variable Based on Voronoi Simulation of Grain Boundary Cavity" Proc.3rd Asia-Symp.on Advacnes in Engineering Plasticity and its Application. Pergamon. 285-290 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 神谷邦夫: "弾塑性-損傷材料のモデル化に対する実験的検討" 材料. 62(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 村上澄男: "変形・損傷・破壊解析における構成式とシミュレーション" 日本機械学会講演論文集. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Liu: "Creep Crack Growth Analysis by Use of a Local Approach Incorporating Perfect Plasticity" Proc.of Creep and Fracture. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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