Visco-Elastic Behavior of Fractured Rock

裂隙岩石的粘弹性行为

• 批准号: 03452238
• 负责人: OKUBO Seisuke
• 金额: $ 4.35万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452238/
• 关键词: Rock; Visco-elasticity; Constitutive Equation; Time Dependence; Creep; Relaxation; Moisture; 岩磐; き裂; レオロジ-; 破壊

At first, a very simple constitutive equation of variable compliance type is discussed, which can be applicable to a fractured rock. The constitutive equation can be solved analytically for several loading conditions such as creep, relaxation, constant strain rate, constant stress rate and allows to examine the relations of time dependent behavior among these loading conditions.Also in this study, six rocks were tested in uniaxial compression up to the post-failure region. With increase of loading rate, it was found for all samples that the strength increases and stress-strain curve in the post-failure region shifts to the right-hand side. The slope of the stress-strain curve, however, does not change meaningfully with loading rate. It should be noted that the increase of strength with 10 fold increase of loading rate has a certain value which does not depend on moisture content.The constitutive equation was used to simulate the loading rate dependency under uniaxial compression tests. It was found that the calculated results give a good approximation to the experimental results for all sample rocks.

首先，讨论了可变合规类型的非常简单的本构方程，可以适用于断裂的岩石。可以通过分析来解决构型方程，例如蠕变，松弛，恒定应变速率，恒定应力率，并允许检查这些负载条件之间的时间依赖行为的关系。此外，在这项研究中，在单轴压缩中进行了六个岩石，直到损失后区域。随着负载速率的增加，发现所有样品的强度会增加，而在失败区域中的应力应变曲线会移到右侧。但是，应力 - 应变曲线的斜率不会随着加载速率而有意义地变化。应当指出的是，加载速率10倍的增加强度的增加具有一定的值，不取决于水分含量。本构方程用于模拟单轴压缩测试下的负载率依赖性。发现计算的结果可与所有样品岩石的实验结果近似。

项目成果

大久保 誠介: "コンプライアンス可変型構成方程式の解析的検討" 資源・素材学会誌. 108. 601-606 (1992)

大久保清介：“可变顺应型本构方程的分析研究”日本资源材料学会杂志108。601-606（1992）。

Seisuke Okubo: "Visco-Elastic Behavior of Fractured rock" J.MMIJ. Vol.108. 601-606 (1992)

Seisuke Okubo：“断裂岩石的粘弹性行为”J.MMIJ。