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Development of innovative dissimilar material joining technology with high strength and high damage resistance to realize a lightweight multi-material structure

Research Project

Project/Area Number 19H02028
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionHiroshima University

Principal Investigator

SUGETA ATSUSHI  広島大学, 先進理工系科学研究科(工), 教授 (60162913)

Co-Investigator(Kenkyū-buntansha) 小山 敦弘  長崎大学, 工学研究科, 准教授 (40324800)
曙 紘之  広島大学, 先進理工系科学研究科(工), 教授 (50447215)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Keywords疲労損傷機構 / 異材接合材 / 微視的観察 / き裂発生 / 疲労寿命評価 / 疲労き裂進展 / 微視的内部観察 / き裂進展 / マルチマテリアル / 摩擦攪拌接合 / 接着接合 / 疲労き裂発生 / 異材継手 / 疲労強度 / 破壊機構 / 接合技術
Outline of Research at the Start

摩擦撹拌技術を援用した金属/FRP異材接合体を用いて,疲労き裂発生ならびにき裂進展挙動のナノスケール損傷その場観察を行い,異材接合体の疲労損傷発達機構を明らかにする.摩擦撹拌技術援用の金属/FRP異材接合体の強度特性は接合時のツールピンの回転数,押し込み速度,保持時間などに顕著な依存性を示すことが考えられるため,これらの条件を実験計画法により割り振った種々の異材接合体を用いて疲労試験ならびに内部損傷観察を行い,接合体の疲労損傷発達機構を明らかにすることで,その損傷発現を抑制する最適な接合技術の開発を行う.

Outline of Final Research Achievements

As lightweight multi-material joint, fatigue tests were conducted using friction stirring joints and weld-bond combined joints for Al / CFRP and Al wrought materials / Al die-cast materials, and adhesive joints for iron-based joints, and their damage mechanisms were evaluated. In all materials, it was clarified that the occurrence of fatigue cracks from the interface tip of the contact part of the base material was the main factor of fracture, and the weak part could be strengthened in the weld-bond combined joint, so the strength could be improved. In the adhesive joint, the effect of water deterioration was investigated, and it was clarified that the main factor of the decrease in strength was the decrease in interface strength due to the rust generated at the interface. The secondary factor was the water deterioration phenomenon of the adhesive, and it was clarified that the crack growth rate was significantly accelerated by being immersed in water for about 3 weeks.

Academic Significance and Societal Importance of the Research Achievements

軽量マルチマテリアル車体の実現のための異材接合継手の強度評価ならびに損傷機構の解明を行った.特に微視的連続観察により,接合体母材界面の先端部が弱部となりそれを起点としてき裂が発生し,その他の損傷と連成する損傷機構メカニズムが解明できた.また,接着剤については水劣化の影響を調べ,界面強度の低下と接着剤自信の劣化を分離して強度評価を行った結果は,これまでなく学術的意義は大きい.各種接合材についての損傷メカニズムが解明できたことにより,それらの発現を極力抑制する接合技術開発への指針を提案できたことは社会的意義も大きい.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (18 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (14 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Effects of Welding Defects on the Fatigue Properties of Spot Welded Automobile Steel Sheets and the Establishment of a Fatigue Life Evaluation Method2022

    • Author(s)
      Yuki Ogawa, Ichiro Ohara, Jinta Arakawa, Hiroyuki Akebono and Atsushi Sugeta
    • Journal Title

      Welding in the World

      Volume: 66 Issue: 4 Pages: 745-752

    • DOI

      10.1007/s40194-021-01238-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Laser Patterning Preprocessing on Fatigue Strength of Adhesive Bonded Joints Using Thin Steel Plate2020

    • Author(s)
      Shikimoto Katsuki、Ishida Shogo、Jinnouchi Wataru、Ogawa Yuki、Akebono Hiroyuki、Sugeta Atsushi
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 61 Issue: 3 Pages: 469-474

    • DOI

      10.2320/matertrans.Z-M2019870

    • NAID

      130007801652

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2020-03-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of jig constraint state during welding process on fatigue properties of Al/CFRP dissimilar welds and fatigue life evaluation based on singular stress2020

    • Author(s)
      Ogawa Yuki、Nakahara Fumiya、Akebono Hiroyuki、Tanaka Kojiro、Sugeta Atsushi
    • Journal Title

      Fatigue & Fracture of Engineering Materials & Structures

      Volume: 43 Issue: 10 Pages: 2259-2269

    • DOI

      10.1111/ffe.13254

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Laser Patterning Preprocessing on Fatigue Strength of Adhesive Bonded Joints Using Thin Steel Plate2020

    • Author(s)
      Katsuki SHIKIMOTO, Shogo ISHIDA, Wataru JINNOUCHI, Yuki OGAWA, Hiroyuki AKEBONO, Atsushi SUGETA
    • Journal Title

      Materials Transactions

      Volume: 61 Pages: 469-474

    • NAID

      130007801652

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] FSSWを用いたAl異材接合継手の疲労特性に及ぼすツール形状の影響2021

    • Author(s)
      野瀨悠生,菅田 淳,曙紘之
    • Organizer
      溶接学会中国支部第6回学生発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] アルミニウム合金ダイカストと圧延材の摩擦攪拌点接合継手の動的強度特性2021

    • Author(s)
      北川和也,菅田 淳,曙紘之
    • Organizer
      先進自動車製造技術における接合技術2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 接着接合継手の疲労き裂進展速度におよぼす水劣化の影響とその定量的評価2021

    • Author(s)
      橘知哉,菅田 淳,曙紘之
    • Organizer
      第20回破壊力学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Al/CFRP 異材点接合継手の二段変動荷重下における疲労特性評価2021

    • Author(s)
      峯岡誠太郎,菅田 淳,曙紘之
    • Organizer
      日本機械学会M&M2021材料力学カンファレンス
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fatigue Crack Behaviour on Thin Steel Sheets Welded by Friction Stir Spot Welding2020

    • Author(s)
      Selvaraj Thomasprabhua,Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta, Yasuhiro Aoki and Hidetoshi Fujii
    • Organizer
      Asian Pacific Conference on Fracture and Strength 2020(APCFS2020, On-line)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 自動車用鋼板を母材とする引張はく離型摩擦攪拌点接合継手の疲労特性に及ぼす接合部径の影響2020

    • Author(s)
      藤田一輝(研究協力者)
    • Organizer
      溶接学会中国支部主催第5回学生発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] アルミ/ダイカストFSSWの動的強度特性の評価2020

    • Author(s)
      北川和也(研究協力者)
    • Organizer
      溶接学会中国支部主催第5回学生発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 接着接合継手の水劣化による接合強度への影響2020

    • Author(s)
      橘 知哉,菅田 淳
    • Organizer
      日本機械学会中国四国学生会第50回卒業発表講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 荷重伝達型すみ肉溶接のルート部における疲労破壊機構の解明2020

    • Author(s)
      林 圭亮,曙紘之,菅田淳
    • Organizer
      日本機械学会中国四国学生会第50回卒業発表講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Al合金/CFRP 異材接合継手の変動荷重下における疲労強度評価2019

    • Author(s)
      中原文弥,小川裕樹,曙紘之,田中耕二郎,菅田淳
    • Organizer
      日本材料学会第68期学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] レーザースポット溶接による薄板鋼板接合継手の疲労特性評価2019

    • Author(s)
      中村大祐,三宮知大,荒川仁太,曙 紘之,山本元道,菅田淳
    • Organizer
      第16回機械・構造物の強度設計,安全性評価に関するシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] レーザースポット溶接による薄板鋼板接合継手の疲労破壊メカニズムの解明2019

    • Author(s)
      三宮知大,中村大祐,荒川仁太,曙 紘之,山本元道,菅田 淳
    • Organizer
      溶接構造シンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 抵抗スポット接合継手の疲労特性に及ぼす負荷形式の影響2019

    • Author(s)
      曽我拓哉,曙紘之,菅田淳,平出隆志,川邉直雄,田川哲哉
    • Organizer
      溶接構造シンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis evaluation study on the fatigue crack propagation behavior of the structures with one-sided welding of the fillet welded joint for load carrying type2019

    • Author(s)
      Takamasa Abe, Hiroyuki Akebono, Atsushi Sugeta
    • Organizer
      International Conference on Advanced Technology in Experimental Mechanics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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