铁道科学与工程学报2018，Vol.15Issue(4)：893-901,9.
温度与围压作用下的岩石损伤本构关系研究
The constitutive relationship of rock damage considering the effect of temperature and confining pressure
摘要
Abstract
Based on the statistical strength theory and the principle of damage mechanics, this paper established the damage model and the constitutive model for rock by regarding its strength follows H-B failure criterion. The effect of temperature and confining pressure under triaxial press test was considered. Methods of theoretical derivation and experimental conduction were used to obtain model parameters. Experimental data extracted from former study, in which sand rock were put in a confining pressure of 15 MPa with different temperatures and a temperature of 200 ℃ with different confining pressure, were used to fit the stress-strain curve according to the damage model. These curves were then compared with original experimental curve to identify the rationality and reliability of the model. The results show that the stress-strain curve calculated by damage model and constitutive model under the condition of a confining pressure of 15 MPa with different temperatures and a temperature of 200 ℃ with different confining pressure fits the experimental stress-strain curve well. The Young's modulus, peak stress, peak strain constant agree with experimental results well. The model established in this paper can reflect the constitutive relation and damage evolution in rock rationally under confining pressure and temperature conditions,therefore, the model and its deduced parameters in this paper are rational and reliable. All in all, this paper worked out a new rock damage model and constitutive model which has certain theoretical value and practical significance.关键词
岩石力学/统计强度理论/温度因素/围压/损伤演化/本构模型Key words
rock mechanics/statistical strength theory/temperature factor/confining pressure/damage model/constitutive model分类
矿业与冶金引用本文复制引用
虞松涛,邓红卫,张亚南..温度与围压作用下的岩石损伤本构关系研究[J].铁道科学与工程学报,2018,15(4):893-901,9.基金项目
国家自然科学基金(面上项目)资助项目(51274253) （面上项目）
