木材乾燥に適応可能な新規レオロジーモデルの開発

开发适用于木材干燥的新流变模型

• 批准号: 13F03393
• 负责人: 藤本 登留
• 金额: $ 1.47万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2013
• 资助国家: 日本
• 起止时间: 2013-04-01 至 2016-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13F03393/
• 关键词: Mechano-srptive creep; cantilever creep test; parameter identification; Sugi; Hinoki; boxed-heart timber; creep; burger model; 木材; 乾燥; 粘弾性; クリープ; ドライングセット; 接線方向曲げ試験; スギ; 温度

Following determination of viscoelastic creep properties of surface and inner layer of Sugi and Hinoki boxed-heart timber, determination of mechano-sorptive creep properties of surface and inner layer of the timbers was then conducted at temperature of 20, 65, 80 and 90°C using cantilever creep test. A load of 20% from its rupture load was applied for the creep test at temperature of 20 and 65°C. In case of the creep test at temperature of 80 and 95°C, a load of 10% from its rupture load was applied at the free-end of the cantilever. Strain gauges was bonded at a fourth span on upper and bottom faces of the specimen. Deflection and strain were measured on the specimen subjected to load and cycling change of relative humidity (RH) in a temperature and humidity chamber for 36 h. Mechano-sorptive creep is defined as a function of cumulative moisture content change and a model consisted of one Kelvin unit and one dashpot connected in a series was used to determined mechano-sorptive creep properties of the timber. From the creep test results, it was found that temperature had significant effects on the creep properties of the timber. The creep compliance of surface and inner layer specimen of the timbers tended to increase as temperature increased. In addition, the largest deflection and creep rate of the specimen was observed at the first RH cycle. Fitting experimental data with model used in this research shows a good agreement. Therefore, model parameters obtained in this research were applicable for identification of mechano-sorptive creep properties of the timber.

在确定了Sugi和Hinoki Boxed Timber e蠕变特性的粘弹性蠕变特性之后，在20、65、80和90°C的温度下，使用悬臂蠕变测试在温度下进行80和95°C，在悬臂上施加了载荷量为10％。对于36 h的开尔文单元和一系列连接的一个仪表板，以确定木材的机械蠕变特性随着温度的升高，木材的表面和内部层标本趋于增加。木材。

项目成果

Mechano-sorptive creep behavior of surface and inner layer of Sugi boxed-heart timber under various temperatures

不同温度下杉木表层和内层的力吸蠕变行为

• 发表时间: 2016
• 作者: 安達桂香;大谷郁;河野通生;ラビンドラパルシン;園元謙二;中山二郎;T. Brenner & S. Matsukawa;Andi Hermawan and Noboru Fujimoto
• 通讯作者: Andi Hermawan and Noboru Fujimoto

Viscoelastic creep behavior of surface and inner layer of Sugi and Hinoki boxed-heart timber under various temperatures

不同温度下杉木和桧木箱心材表层和内层的粘弹性蠕变行为

• 发表时间: 2015
• 作者: Kamruzzaman M.;Makino Y.;Oshita S.;Andi Hermawan and Noboru Fujimoto
• 通讯作者: Andi Hermawan and Noboru Fujimoto

Viscoelastic creep behavior of Sugi and Hinoki under various temperatures

Sugi和Hinoki在不同温度下的粘弹性蠕变行为

• 发表时间: 2015
• 作者: R.P.Singh;K. Okubo;K. Sonomoto;J. Nakayama;Andi Hermawan and Noboru Fujimoto
• 通讯作者: Andi Hermawan and Noboru Fujimoto