New theory of rock fracture based on interaction between pre-existing

基于预先存在的相互作用的岩石破裂新理论

• 批准号: 23656557
• 负责人: MATSUKI Koji
• 金额: $ 2.16万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23656557/
• 关键词: 多結晶岩石; 一軸引張破壊; 粒界き裂; 関連流れ則; 粘弾性; コアの損傷; DSCA; 応力解放

Using specimen models of monomineral polycrystalline rock created on a computer, we performed both analysis of uniaxial tensile fracture and estimation of rock damage due to the viscoelastic behavior of grain boundaries during stress relief. In the former, we have clarified fracture mechanisms such that the conversion of failure mode from tension to shear always occurs during the completion of the final failure plane. In the latter, it has been shown that there is a stress region for which both the magnitudes and directions of the principal stresses can be accurately estimated by DSCA and this region becomes wider as the depth increases. Thus, we can now approach to the construction of a new theory of rock fracture by extending stress conditions.

使用在计算机上创建的单矿物多晶岩石的样本模型，我们进行了单轴拉伸断裂分析，并估计了由于应力释放过程中晶界的粘弹性行为而导致的岩石损伤。在前者中，我们阐明了断裂机制，使得失效模式从拉伸到剪切的转换总是发生在最终失效平面的完成过程中。在后者中，已经表明存在一个应力区域，通过 DSCA 可以准确估计主应力的大小和方向，并且该区域随着深度的增加而变宽。因此，我们现在可以通过扩展应力条件来构建新的岩石破裂理论。

项目成果

Analysis of uniaxial tensile fracture of monomineral polycrystalline rock based on intergranular cracking

基于晶间裂纹的单矿物多晶岩石单轴拉伸断裂分析

• 发表时间: 2011
• 作者: K. Matsuki;Y. Karino;K. Sakaguchi;A. Kizaki
• 通讯作者: A. Kizaki

粒界の粘弾性挙動に基づく応力解放時の岩石の損傷評価

基于晶界粘弹性行为的应力释放过程中岩石损伤评价

• 发表时间: 2012
• 期刊: Journal of MMIJ
• 作者: 松木浩二;及川寧己;坂口清敏;木崎彰久
• 通讯作者: 木崎彰久