Estimation of properties and yield criterion of wood by utilizing multi-scale finite element method

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K15319
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: The University of Electro-Communications
• Principal Investigator: Kajikawa Shohei 電気通信大学, 大学院情報理工学研究科, 准教授 (00772815)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 木質系材料 / 木材 / マルチスケール解析 / 大変形加工 / 仮想材料試験 / 有限要素法（FEM） / 均質化法 / 離散要素法（DEM）

Outline of Final Research Achievements

A numerical analysis method that can reproduce the deformation behavior of wood with high accuracy has not been developed due to the complex structure of wood although the use of deformation simulation by numerical analysis is useful in research and development of processing technology. In this study, a numerical analysis by the finite element method (FEM), homogenization method, and discrete element method (DEM) using a model that has the structure of wood was proposed in order to reproduce the deformation behavior of wood. By comparing the analysis results with experimental results, the analytical model was optimized, and the analysis using the optimized model showed the possibility of predicting the material properties and reproducing the deformation behavior of wood.

Free Research Field

材料加工

Academic Significance and Societal Importance of the Research Achievements

本研究では，木材の変形挙動を再現可能な数値解析手法を新しく提案し，提案手法によって，木材の材料特性予測や，変形挙動を再現できる可能性を示した．今後，この手法を発展させ，木材加工に関する研究開発に取り入れることによって，研究開発を加速化し，低環境負荷な循環型資源である木材の有効利用の促進が期待できる．さらに，木材の内部構造が変形挙動に及ぼす影響など，これまで明らかになっていなかった学術的な知見も期待できる．