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

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K06165
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 40020:Wood science-related
• Research Institution: Shimane 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
• Keywords: 木材 / 木質材料 / 変形特性 / 強度特性 / 欠陥

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.

Free Research Field

木材物理学

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。