Examination of the source of differences among the fracture mechanics properties of wood and wood-based materials obtained by different methods and establishment of the novel characterization methods

检查不同方法获得的木材和人造材料断裂力学性能差异的来源并建立新的表征方法

• 批准号: 21580207
• 负责人: YOSHIHARA Hiroshi
• 金额: $ 3.08万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21580207/
• 关键词: 破壊力学特性値; 評価法; 破壊力学; 特性評価法; 木材; 中密度繊維板; ENF試験; 非対称4点曲げ試験; DCB試験; SENB試験; CT試験; SENT試験; テーパ付試験体; 開口モード

Although the fracture mechanics properties of wood and wood-based materials are essentially the material parameters as well as the elastic properties and strengths, it has been suggested that they are often dependent on the measurement methods and specimen configurations. This dependence is though to be because of the ignorance of nonlinear behaviors ahead of the crack tip. In this study, several methods for characterizing the fracture mechanics properties of wood and wood-based materials were proposed while considering the nonlinear behaviors induced at the crack tip. In addition, the methods proposed in this study were also effective for predicting the strength properties of a crack-free specimen as well as those of the specimen with a crack.

虽然木材和木基材料的断裂力学性能本质上是材料参数以及弹性性能和强度，但人们认为它们往往取决于测量方法和试样结构。这种依赖性是因为忽略了裂纹尖端的非线性行为。在这项研究中，提出了几种方法来表征木材和木基材料的断裂力学性能，同时考虑在裂纹尖端诱导的非线性行为。此外，在这项研究中提出的方法也是有效的预测无裂纹试样的强度性能，以及与裂纹的试样。

项目成果

Tensile strength of spruce with a short crack in the radial-tangential system

径向-切向系统中具有短裂纹的云杉的拉伸强度

• 发表时间: 2010
• 期刊: J. Forest Biomass Res. Soc.
• 作者: Susanti C. M. E.;Nakao T.;Yoshihara H
• 通讯作者: Yoshihara H

Examination of the mode I critical stress intensity factor of wood obtained by single-edge-notched bending test

• DOI: 10.1515/hf.2010.083
• 发表时间: 2010-06-01
• 期刊: HOLZFORSCHUNG
• 影响因子: 2.4
• 作者: Yoshihara, Hiroshi

Examination of the failure behavior of wood with a short crack in the radial-longitudinal system by single-edge-notched bending test

单边缺口弯曲试验检验径向-纵向系统中短裂纹木材的破坏行为

• DOI: 10.1007/s10086-012-1266-6
• 发表时间: 2012
• 期刊: J. Wood Sci.
• 作者: Nakao;T.;Susanti;C. M. E.;Yoshihara;H
• 通讯作者: H

Examination of the failure behaviour of wood with a short crack in the tangential-radial system by single-edge-notched bending test

单边缺口弯曲试验检验切向-径向系统中短裂纹木材的破坏行为

• DOI: 10.1016/j.engfracmech.2010.05.019
• 发表时间: 2010
• 期刊: Eng. Fract. Mech.
• 作者: Susanti C. M. E.;Nakao T.;Yoshihara H
• 通讯作者: Yoshihara H

Mode I and mode II initiation fracture toughness and resistance curve of medium density fiberboard measured by double cantilever beam and three-point bend end-notched flexure tests

• DOI: 10.1016/j.engfracmech.2010.06.015
• 发表时间: 2010-09
• 期刊: Engineering Fracture Mechanics
• 影响因子: 5.4
• 作者: H. Yoshihara