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X-Ray Nondestructive Stress Measurement and Deformation Evaluation of High Strength Plastics

Research Project

Project/Area Number 18H01333
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 InstitutionYokohama National University

Principal Investigator

AKINIWA Yoshiaki  横浜国立大学, 大学院工学研究院, 教授 (00212431)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
KeywordsX線 / 回折法 / 高分子 / ひずみ / 応力 / 機械的性質
Outline of Final Research Achievements

Although polymers are important as lightweight materials, it is necessary to nondestructively evaluate the stress and deformation damage existing in the materials for safe and secure use. In this study, a method to nondestructively evaluate the stress and deformation behavior of high-strength polymer materials was investigated using the X-ray method. There are two types of polymer materials, crystalline and amorphous, and even crystalline materials have amorphous parts.
In this study, we investigated a method for measuring stress not only in crystalline materials but also in amorphous materials for some polymer materials. In particular, we also examined a method for evaluating the amount of deformation when the elastic deformation region that returns to its original state after unloading is included and is deformed to the extent that it cannot return to its original state.

Academic Significance and Societal Importance of the Research Achievements

本研究において最も重要な成果は,結晶性高分子および非晶性高分子いずれも,従来のX線装置を用いて応力測定が可能であることを示した点である.特に非晶性材料においては,回折情報が低い角度に現れるハローピークを利用することができることを示した点である.回折情報に対してやや難解な補正を施した場合と,簡便に測定情報をそのまま利用した場合でも則手精度に大きな生じないことを示したが,これは,本手法を現場技術として簡便に利用できることを意味しており,汎用的な手法として期待できる.さらに,弾性域を超えて,塑性変形が生じる場合についても,その変形の程度が評価できることを明らかにすることができた.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (5 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Measurement of the X-ray Elastic Constants of Amorphous Polycarbonate2020

    • Author(s)
      Kawamura Yuki、Akiniwa Yoshiaki
    • Journal Title

      Quantum Beam Science

      Volume: 4 Issue: 4 Pages: 35-35

    • DOI

      10.3390/qubs4040035

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] X線法による非晶質ポリカーボネート切欠き材 のひずみ分布評価2020

    • Author(s)
      向山祐樹,秋庭 義明
    • Organizer
      日本材料学会第54回X線材料強度に関するシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] X 線による非晶質ポリカーボネートの応力評価2019

    • Author(s)
      竹澤遼,秋庭義明,竹田英俊
    • Organizer
      日本材料学会 第53回X線材料強度に関するシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 熱処理されたポリエーテルエーテルケトンのX 線応力測定2019

    • Author(s)
      伊田幹太,秋庭義明
    • Organizer
      日本材料学会 第53回X線材料強度に関するシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] X線法による非晶質ポリカーボネートの変形評価2018

    • Author(s)
      秋庭義明,河村優生,山本康平,竹田英俊
    • Organizer
      第52 回X線材料強度に関するシンポジウム
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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