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，讨论了一个非常简单的适用于裂隙岩石的变柔量型本构方程。本构方程可以针对多种载荷条件（例如蠕变、松弛、恒定应变率、恒定应力率）进行解析求解，并允许检查这些载荷条件之间时间相关行为的关系。此外，在本研究中，还对六种岩石进行了单轴测试压缩至失效后区域。随着加载速率的增加，发现所有样品的强度都增加，并且失效后区域的应力-应变曲线向右侧移动。然而，应力-应变曲线的斜率不会随加载速率发生有意义的变化。需要注意的是，随着加载速率增加10倍，强度的增加具有一定的值，该值与含水量无关。利用本构方程模拟了单轴压缩试验下的加载速率依赖性。结果发现，计算结果非常接近所有岩石样本的实验结果。

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。