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Establishment of the methods for evaluating the deformation and strength properties of solid wood and wood-based materials with various defects

Research Project

Project/Area Number 20K06165
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40020:Wood science-related
Research InstitutionShimane University

Principal Investigator

Hiroshi Yoshihara  島根大学, 学術研究院環境システム科学系, 教授 (30210751)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords木材 / 木質材料 / 変形特性 / 強度特性 / 欠陥 / 力学的特性 / 実験的評価 / 評価法
Outline of Research at the Start

本研究の目的は,無欠点材料から様々な性状の欠陥が含まれる材料の変形および強度特性を包括的に予測できる木材および木質材料独自の新しい評価法を確立することである。この目的を達成するために,以下の①から③について明らかにする。
① 木材および木質材料の変形および強度特性の評価における従来の力学理論の適用性
② 木材および木質材料に様々な大きさ,形状の欠陥が様々な位置に含まれた際の変形および強度特性(異方性や木質材料を構成する材料の影響など)
③ 木材および木質材料が,実際の構造物で想定される複合応力状態に置かれた場合の変形および強度特性

Outline of Final Research Achievements

When solid wood and wood-based materials are used as structural members with defects, the deformation and strength properties of the structure are often dominated by the characteristics of the defects. However, the effects of defects have not been sufficiently revealed; therefore, methods for evaluating their effects have not been well established. In this study, using samples with defects to characterize the mechanical properties of solid wood and wood-based materials with defects (open holes), several examinations, including flexural vibration, torsional vibration, asymmetric four-point bending tests, were performed to establish the aforementioned methods.

Academic Significance and Societal Importance of the Research Achievements

近年,大型の建築物に木材や木質材料を使用することが増えてきている。構造物の性能規定化によって木材や木質材料への要求性能が明確になり,より厳しい目を向けられるようになってきた。特に,木材や木質材料の強度特性には材料に含まれる欠陥の大きさ,形状および欠陥の位置などの多様な性状が影響する。したがって,木材や木質材料に含まれる欠陥がその変形や強度特性に影響を及ぼすメカニズムを包括的に説明し得る理論を解明することで,上述した建築構造物の安全性の評価が可能になるというきわめて重要な課題である。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2022 2021 2020

All Journal Article (14 results) (of which Peer Reviewed: 14 results,  Open Access: 5 results) Presentation (5 results)

  • [Journal Article] Buckling Test of Flat Cardboard and Examination of Critical Load for Buckling2022

    • Author(s)
      Yoshihara Hiroshi、Yoshinobu Masahiro、Maruta Makoto
    • Journal Title

      Mokuzai Gakkaishi

      Volume: 68 Issue: 4 Pages: 165-171

    • DOI

      10.2488/jwrs.68.165

    • ISSN
      0021-4795, 1880-7577
    • Year and Date
      2022-10-25
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the Shear Modulus of Paperboard Measured from a Torsional Vibration Test2022

    • Author(s)
      YOSHIHARA Hiroshi、YOSHINOBU Masahiro、MARUTA Makoto
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 71 Issue: 7 Pages: 585-590

    • DOI

      10.2472/jsms.71.585

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2022-07-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Shear Modulus of Open-Hole Sitka Spruce Obtained from a Torsional Vibration Test2022

    • Author(s)
      YOSHIHARA Hiroshi、MARUTA Makoto
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 71 Issue: 5 Pages: 467-470

    • DOI

      10.2472/jsms.71.467

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2022-05-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Torsional Vibration Tests of Extruded Polystyrene with Improved Accuracy in Determining the Shear Modulus2022

    • Author(s)
      Yoshihara Hiroshi、Wakahara Momoka、Yoshinobu Masahiro、Maruta Makoto
    • Journal Title

      Polymers

      Volume: 14 Issue: 6 Pages: 1148-1148

    • DOI

      10.3390/polym14061148

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Determination of the resistance curve of solid wood by measuring two load?deflection compliances in the double cantilever beam and three-point end-notched flexure tests2022

    • Author(s)
      Yoshihara Hiroshi、Maruta Makoto
    • Journal Title

      Engineering Fracture Mechanics

      Volume: 276 Pages: 108876-108876

    • DOI

      10.1016/j.engfracmech.2022.108876

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bending stiffness and moment capacity of cardboard obtained from three-point and elastica bending tests2022

    • Author(s)
      Yoshihara Hiroshi、Yoshinobu Masahiro、Maruta Makoto
    • Journal Title

      Nordic Pulp & Paper Research Journal

      Volume: 38 Issue: 1 Pages: 73-85

    • DOI

      10.1515/npprj-2022-0087

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 円孔を有する試験体のねじり振動試験によるシトカスプルースのせん断弾性係数の評価2022

    • Author(s)
      吉原 浩,丸田 誠
    • Journal Title

      材料

      Volume: 71

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] ねじり振動試験から得られた板紙のせん断弾性係数の評価2022

    • Author(s)
      吉原 浩,吉延匡弘,丸田 誠
    • Journal Title

      材料

      Volume: 71

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 板紙の座屈試験と座屈荷重の評価方法の検討2022

    • Author(s)
      吉原 浩,吉延匡弘,丸田 誠
    • Journal Title

      木材学会誌

      Volume: 68

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mode II critical stress intensity factor of solid wood obtained from the asymmetric four-point bend fracture test using groove-free and side-grooved samples2021

    • Author(s)
      Yoshihara Hiroshi、Maruta Makoto
    • Journal Title

      Engineering Fracture Mechanics

      Volume: 258 Pages: 108043-108043

    • DOI

      10.1016/j.engfracmech.2021.108043

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 逆対称4点曲げ試験による木材の木口面のせん断強さの評価2021

    • Author(s)
      吉原 浩,吉延匡弘,丸田 誠
    • Journal Title

      木材工業

      Volume: 75 Pages: 296-300

    • NAID

      40022665337

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Determining the Young’s modulus of solid wood by considering the fundamental frequency under the free-free flexural vibration mode2021

    • Author(s)
      Yoshihara Hiroshi、Maruta Makoto
    • Journal Title

      Wood Science and Technology

      Volume: 55 Issue: 4 Pages: 919-936

    • DOI

      10.1007/s00226-021-01306-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Critical load for buckling of solid wood elements with a high slenderness ratio determined based on elastica theory2021

    • Author(s)
      Yoshihara Hiroshi、Maruta Makoto
    • Journal Title

      Holzforschung

      Volume: 76 Issue: 2 Pages: 179-187

    • DOI

      10.1515/hf-2021-0108

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 4種の試験方法から得られた板紙のヤング率の比較2021

    • Author(s)
      吉原 浩,吉延匡弘,丸田 誠
    • Journal Title

      木材学会誌

      Volume: 67

    • NAID

      130008111215

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] プラズマ放電処理による表面改質和紙の水分収着特性2022

    • Author(s)
      吉延匡弘,平岡凜太郎,吉原 浩
    • Organizer
      2022年度日本木材学会中国・四国支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 両端自由ねじり振動試験による板紙のせん断弾性係数の測定2021

    • Author(s)
      吉原 浩,吉延匡弘,丸田 誠
    • Organizer
      2021年度日本木材学会中国・四国支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] ラッカセイ外殻の繊維化2021

    • Author(s)
      吉延匡弘,楠田翔大,吉原 浩
    • Organizer
      2021年度日本木材学会中国・四国支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 非対称4点曲げ試験による木材の木口面のせん断強さの評価2020

    • Author(s)
      吉原 浩,吉延匡弘
    • Organizer
      2020年中国・四国地域木材関連学協会支部合同セミナー
    • Related Report
      2020 Research-status Report
  • [Presentation] 高純度パルプのグラフト共重合反応性におよぼす繊維サイズの影響2020

    • Author(s)
      持田一成,吉延匡弘,吉原 浩
    • Organizer
      2020年中国・四国地域木材関連学協会支部合同セミナー
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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