| 郝圣旺*,孙 菊.岩石变形演化诱致灾变破坏过程的同步实验观测[J].实验力学,2008,23(1):89~95 |
| 岩石变形演化诱致灾变破坏过程的同步实验观测 |
| The Synchronous Observations on Deformation Localization Induced Catastrophic Rupture of Rock |
| 投稿时间：2007-07-10 修订日期：2007-12-02 |
| DOI： |
| 中文关键词: 同步观测； 局部化； 灾变破坏 岩石 |
| 英文关键词:synchronous observations localization catastrophic rupture rock |
| 基金项目:国家自然科学基金（批准号：10472118） |
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| 中文摘要: |
| 将试样变形场演化特征与试样的宏观载荷位移曲线的演化特征结合起来研究是揭示非均匀脆性介质变形演化诱致灾变破坏的一个重要途径。本文发展了一套实验系统，通过对试样表面变形场的演化、宏观载荷和位移信号的同步观测，对单轴加载下岩石试样变形演化和灾变破坏的过程进行了实验研究。揭示了试样变形场由加载初期的随机涨落到灾变破坏前出现明显的变形局部化的演化特征现象，试样最终在变形局部化区内形成宏观破裂面。 |
| 英文摘要: |
| The combined study on the evolution of deformation field pattern and force-displacement curve is a key way to capture the intrinsic mechanism of deformation evolution induced catastrophic rupture. In present paper, a system for the synchronous observation of load, displacement and deformation field is set up. The observations on the evolution of surface deformation field and the catastrophic rupture of a rock under uniaxial compression are carried out. It is found that the evolution of surface deformation field displays two phases: at the early stage, the deformation field keeps nearly uniform with weak fluctuations increasing slowly; but at the stage prior to catastrophic rupture, an obvious localization develops and the ultimate macro-fracture forms in the localized zone. |
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