2007 Fiscal Year Final Research Report Summary
Investigation of Mechanical Properties and data base development of wood as hierarchical structure based microstructure analysis.
| Project/Area Number |
17560081
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Chuo University |
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Principal Investigator |
TSUJI Tomoaki Chuo University, Faculty of Science and Engineering, Professor (80188531)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Wood / Young's modulus / Early part of wood / Late part of wood / Finite Element Method / Hot roll compression / Bending test / Tensile test |
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| Research Abstract |
Wood is roughly divided into three layered structures. And at each level, mechanical properties and strength are measured. By using these results characteristics of wood are analyzed.
The measurement method of Young's modulus of wood on early part and late part is developed. In this method, the tensile test and/or the bending test is executed by cutting the wood specimen along annual ring. The Young's modulus on early part and late part are given as the values, which minimize the square error in between the theoretical average Young's modulus and the measured average Young's modulus. The efficiency of this proposed method is confirmed by obtaining the Young's modulus for the late and early wood of a Japanese cedar.
A local elastic modulus on the early part of a wood and late part of a wood are measured by nanoindentation technique. The elastic modulus given by this method is in agreement with the one by using the previous macroscopic method.
The simulations of the thin wood board, which is compressed by two hot rolls, are carried out. The FEM analysis is performed in consideration with the coupling between the temperature fields and the structure deformation field. It is confirmed that the deformation simulation of wood can be made, if the mechanical properties of wood are given.
The almost aimed results could be achieved, but some results could not be achieved. The method to analyze the mechanical properties of wood is fully investigated. It is important to measure many wood by using the method given by the present research.
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Research Products
(14 results)
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[Journal Article] THERMAL STRESS ANALYSIS OF THE THIN WOOD BOARD IN HOT ROLL COMPRESSION IN CONSIDERATION WITH THE COUPLING BETWEEN TEMPERATURE AND DEFORMATION2005
Author(s)
T., Nakamura, T., Tsuji, D., Ikegami, N., Aikawa, K., Kanayama, Y., Obata
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Journal Title
Proceedings of The Sixth International Congress on Thermal Vol. 1
Pages: 417-420
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 材料力学および固体の力学教育2007
Author(s)
辻 知章, 松永 泰弘, 畑 俊明
Organizer
日本機械学会M&M2007材料力学カンファレンス
Place of Presentation
東京大学生産技術研究所
Year and Date
2007-10-25
Description
「研究成果報告書概要(和文)」より
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