| Predicting time-to-failure in rock extrapolated from secondary creep | |
Hao SW(郝圣旺) ; Zhang BJ; Tian JF; Elsworth D; Hao, SW (reprint author), Yanshan Univ, Sch Civil Engn & Mech, Qinhuangda, Peoples R China.
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| Source Publication | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 2014-03 | |
| Volume | 119Issue:3Pages:1942-1953 |
| ISSN | 2169-9313 |
| Abstract | Stress relaxation experiments are reported that culminate in energetic failure in rocks analogous to the loading cycle and subsequent localization or reactivation on brittle faults embedded in an elastic medium. Universally, rapid primary deformation arrests and transitions into a long secondary deformation phase that ultimately accelerates to catastrophic rupture. Primary deformation (u) conforms to Andrade's law as du/dt similar to (t(c) - t(0))(theta) with a standard exponent of 2/3. In the long, and readily observable, secondary phase, the samples both deform and analogously shed load near linearly in time. This stress relaxation rate exhibits a robust power law dependency with time-to-rupture and exhibits the same 2/3 power law exponent observed in the primary phase. Similarly, the brittle strain energy released in the tertiary collapse scales with a normalized secondary stress relaxation rate. Together, these observations suggest a way to predict both the timing of rupture and its energetics from the observed stress (or strain) rate during the secondary relaxation stage. |
| Subject Area | Geochemistry & Geophysics |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000336844700023 |
| Funding Organization | This work is supported by National Basic Research Program of China (grant 2013CB834100). We acknowledge useful comments of Editor, Tom Parsons, and two anonymous reviewers. |
| Department | LNM材料的分子/细观统计力学行为 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/48872 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Hao, SW (reprint author), Yanshan Univ, Sch Civil Engn & Mech, Qinhuangda, Peoples R China. |
| Recommended Citation GB/T 7714 | Hao SW,Zhang BJ,Tian JF,et al. Predicting time-to-failure in rock extrapolated from secondary creep[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2014,119,3,:1942-1953. |
| APA | Hao SW,Zhang BJ,Tian JF,Elsworth D,&Hao, SW .(2014).Predicting time-to-failure in rock extrapolated from secondary creep.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,119(3),1942-1953. |
| MLA | Hao SW,et al."Predicting time-to-failure in rock extrapolated from secondary creep".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 119.3(2014):1942-1953. |
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