2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Structural Hierarchy and Viscosity of Geomedium
Chengzhi Qi1;1BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE, Beijing, China;
Type of Paper: Regular
Id Paper: 62
Topic: 1
Abstract:
The relationship between structural hierarchy and viscosity of geomedium is examined. It is showed that viscosity and characteristic strain rate of rock mass vary at different structural levels. There exists a one-to-one correspondence between characteristic scale level and strain rate, which have inversely proportional relationship. High viscosity with low characteristic strain rate is for macro-level, while meso- and micro-levels are characterized by low viscosity and high characteristic strain rate. Generally, with the increase of strain rate, deformation and fracture take place at decreasing scale levels, and viscosity gradually decreases. With high characteristic strain rate at meso- and micro-levels, the viscosity is inversely proportional to strain rate at these levels. Based on the analysis of viscosity at different structural levels, unified description of viscosity at different structural levels is suggested and applied to the description of the strength-strain rate sensitivity of rock mass.