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Application of Neural Networks to Design, Evaluation and Modeling of Nonhomogeneous Structural Materials

Research Project

Project/Area Number 05302029
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field Materials/Mechanics of materials
Research InstitutionUniversity of Tokyo

Principal Investigator

YAGAWA Genki  University of Tokyo, School of Engineering, Professor, 大学院・工学系研究科, 教授 (40011100)

Co-Investigator(Kenkyū-buntansha) OKUDA Hiroshi  University of Tokyo, School of Engineering, Associate Professor, 工学部, 助教授 (90224154)
YOSHIMURA Shinobu  University of Tokyo, School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (90201053)
KANTO Yasuhiro  Toyohashi University of Technology, Dept.of Energy Engineering, Associate Profes, 工学部, 助教授 (60177764)
NAKAGAKI Michihiko  Kyushu Institute of Technology Faculty of Information Engineering, Professor, 情報工学部, 教授 (90207720)
FUKUDA Shuichi  Tokyo Metropolitan Institute of Technology, Dept.of Management Engineering, Prof, 工学部, 教授 (90107095)
邉 吾一  日本大学, 生産工学部, 教授 (90060079)
菊池 正紀  東京理科大学, 理工学部, 教授 (90107540)
本間 寛臣  豊橋技術科学大学, エネルギー工学系, 教授 (70016583)
結城 良治  生産技術研究所, 助教授 (70114709)
Project Period (FY) 1993 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥10,600,000 (Direct Cost: ¥10,600,000)
Fiscal Year 1995: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1993: ¥4,300,000 (Direct Cost: ¥4,300,000)
KeywordsMultilayr neural networks / Computational Mechanics / Fracture Mechanics / Functionally Graded Material / Composite Material / Crack Identification / Model Simplification / Inverse Problems / 簡略化モデル / 溶接材料 / 傾料機能材料
Research Abstract

Nonhomogeneous structural materials involve composite materials and bonded/welded materials. They are developed in order to realize better characteristics by combining several different materials. Compared with ordinary homogeneous materials, such nonhomogeneous materials would have some additional parameters controlling macroscopic material properties, i.e. difference of material properties, mixture ratio, mixing methods and so on. Thus it becomes very complicated and difficult to design, evaluate and model such nonhomogeneous materials. Through co-operative works among several researchers, this project investigated innovative methods for designing, evaluating and modeling nonhomogenous materials by combining neural networks and computational mechanics.
Principal results of this study are as follows. (1) A constitutive relation of functionally graded material (FGM) in a thermal elastoplastic region is well modeled by combining neural networks and micromechanics for randomly distributed particle model.(2) Neural network based nondestructive crack detection methods were developed for ultrasonics and electric potential drop methods. They were successfuly applied to detect three dimensional surface cracks and inclined defects. (3) A neural network based inverse analysis method was successfully applied to identify damage area of fiber reinforced composite beam by measuring its eigen frequencies and modes. (4) Rough shape is hierarchically modeled using a quadtree technique, and is transformed into list structure using the coded boundary representation technique, and finally is converted into a simple shape model using neural networks.

Report

(4 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] 邊、木野山: "ニューラルネットワークによるCFRP対称積層板の座屈設計" 日本機械学会論文集(A編). Vol.60 No.570. 569-574 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] A.Oishi, K.Yamada, S.Yoshimura & G.Yagawa: "Quantitative Nondestructive Evaluation with Ultrasonic Method Using Neural Networks and Computational Mechanics" Computational Mechanics. Vol.15. 521-523 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] G.Yagawa, A.Matsuda, H.Kawate & S.Yoshimura: "Neural Network Approach to Estimate Stable Crack Growth in Welded Specimens" Int.Pres.Vessels & Piping. Vol.63. 303-313 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yoshimura, Y.Saito and G.Yagawa: "Identification of Two Dissimilar Surface Cracks Hidden in Solid Using Neural Networks and Computational Mechanics" Computer Modeling and Simulation in Eng.Vol.1. 477-491 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 大石、山田、吉村、矢川: "ニューラルネットワークと計算力学に基づく超音波欠陥同定(斜め欠陥の同定とロバスト性の検証)" 日本機械学会論文集(A編). Vol.62. 2350-2357 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yoshimura, A.Matsuda & G.Yagawa: "New Regularization Method by Trasformation for Neural Network Based Inverse Analyses and Its Application to Structure Identification" Int.J.for Numer.Methods in Eng.Vol.39. 3953-3968 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] G.Ben, Kinoyama: "Buckling Design of CFRP Symmetric Multilayred Plate Using Neural Networks" Journal of JSME. Vol.60A,No.570. 569-574 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] A.Oishi, K.Yamada, S.Yoshimura & G.Yagawa: "Quantitative Nondestructive Evaluation with Ultrasonic Method Using Neural Networks and Computational Mechanics" Computational Mechanics. Vol.15. 521-523 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] G.Yagawa, A.Matsuda, H.Kawate & S.Yoshimura: "Neural Network Approach to Estimate Stable Crack Growth in Welded Specimens" Int.J.Pres.Vessels & Piping. Vol.63. 303-313 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yoshimura, Y.Saito and G.Yagawa: "Identification of Two Dissimilar Surface Cracks Hidden in Solid Using Neural Networks and Computational Mechanics" Computer Modeling and Simulation in Eng.Vol.1. 477-491 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] A.Oishi, K.Yamada, S.Yoshimura & G.Yagawa: "Quantitative Nondestructive Evaluation with Ultrasonic MethodUsing Neural Networks and Computaitonal Mechanics (Identification of Inclined Defect and Verification of Robustness)" Journal of JSME. Vol.62. 2350-2357 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Yoshimura, A.Matsuda & G.Yagawa: "New Regularization Method by Transformation for Neural Network Based Inverse Analyzes and Its Application to Structure Identification" Int.J.for Numer.Methods in Eng.Vol.39. 3953-3968 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] A. Oishi, K. Yamada, S. Yoshimura, G. Yaguwa: "Quantitative Nondestructive Evalnation with Ultrasonic Method using Neural Networks and Computational Mechanics" Computational Mechanics. Vol.15. 521-533 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] G. Yagawa, A. Matsuda, H. Kawate, S. Yoshimara: "Neural Network Approach to Estimate Stable Crack Growth in Welded Specimens" Int. J. Rres. Ves. & Piping. Vol.63. 303-313 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] S. Yoshimura, Y. Saito, G. Yagawa: "An Automated Inverse Andlysis System Using Neural Networke and Computational Mechanics with Its Application to ldentification of 3-D Crack Shape Hidden in Solid." 13th Int. Conf. Structural Mechanics in Reactor Technology. Vol.2. 473-478 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 青木義男,邉,吾一: "円孔を有する先端複合材料積層板の振動特性" 日本機械学会論文集(A編). Vol.60-No.583. 575-580 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M. Nakagaki, R. Kuranari, Y. Shibata, S. Hagihara: "Elastoplastic Crack Andlysis of Thermally Shacked Furctionally Giaded material with Neural Network Application" 1995 ASME/JSME Rressre Vessele & Prping Conf.PuP-Vol.304. 115-120 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 大石篤哉、山田勝稔.吉村 忍、矢川元基: "EWSネットワークによる動的問題の並列有限要素解析" 日本機械学会論文集(A編). Vol.62-No.593. (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 吉村,松田,矢川: "ニューラルネットワークに基づく逆問題解析法のための学習データ適切化法" 日本機械学会論文集C編. 60. 4260-4266 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] A.Oish,K.Yamada,S.Yoshimura,G.Yagawa: "Quantitative Nordestructive Examination with Ultrasonic Method Using Neural Networks and Computational Methanics" Computational Mechanics. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 井上,赤星,原田: "分子動力学法援用による破壊記述パラメータ" 日本機械学会論文集A編. 60. 2236-2241 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Nakagaki,R.Kuranari,Y.Shibata,S.Hagihara: "Elastoplastic Crack Analysis of Thermally Shocked Functionally Graded Material with Neural Network Application" 1995 ASME/JSME Pressure Vessels &Piping Conf.(発表予定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Yoshimura,Y.Saito,G.Yagawa: "An Automated Inverse Analysis System Using Neural Networks and Computational Mechanics with Its Application to Identification of 3-D Crack Shane Hidden in Solid" 13th Int.Conf.Structural Mechanics in Reactor Technology. (発表予定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 福田・山崎: "ヒューマンフレンドリーな曲線生成法の開発" 日本機械学会論文集C編. 60. 3657-3661 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 大石篤哉、山田勝稔、吉村忍、矢川元基: "ニューラルネットワークと計算力学に基づく欠陥同定(超音波非破壊検査への応用)" 日本機械学会論文集A編. 60. 264-272 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 矢川元基、吉村忍、大石隆寛: "階層形ニューラルネットワークと計算力学による三次元き裂の形状同定" 日本機械学会論文集A編. 59. 526-534 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 矢川元基、吉村忍、川手秀樹、松田聡浩: "非均質材料の非線形破壊力学評価におけるニューラルネットワークアプローチ" 日本材料学会第7回破壊力学シンポジウム講演論文集. 270-274 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Yoshimura,G.Yagawa: "Inverse Analysis by Means of Neural Network and Computational Mechanics:Its Application to Structural Identification of Vibrating Plate" Inverse Problems (Specialized Monogragh of ICES'92). 184-193 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 邊吾一、西恭一: "ニューラルネットワークのCFRP弾性係数設計への応用" 日本機械学会論文集A編. 58. 31-37 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 赤星保浩、吉村忍、矢川元基、曽根田直樹、酒井高行、井上昌信: "ニューラルネットワークの渦電流探傷システムへの応用" 第14回計算電気・電子工学シンポジウム講演論文集. 247-250 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 結城良治編: "界面の力学" 培風館, 283 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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