| 饱和、非饱和岩石损伤统计本构模型探讨 |
| |
| 引用本文： | 韦立德,徐卫亚,杨春和.饱和、非饱和岩石损伤统计本构模型探讨[J].岩石力学与工程学报,2004,23(Z1):4285-4291. |
| |
| 作者姓名： | 韦立德 徐卫亚 杨春和 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所,武汉,430071
2. 河海大学岩土工程研究所,南京,210098 |
| |
| 基金项目： | 国家自然科学基金(50128908,50374064,50334060)和国家重点基础研究发展规划(973)项目(2002CB412704)资助课题. |
| |
| 摘 要： | 基于统计理论和损伤力学对岩石在荷载作用下的破坏、损伤特征进行了探讨,建立了弹性损伤统计本构模型。在损伤演化方程中全部采用有效应力,并能反映岩石剩余强度。在混合物理论基础上,建立了饱和、非饱和岩石损伤软化统计本构模型。该模型能反映岩石在单轴抗压试验中初始加载阶段全应力-应变曲线稍向上凹曲的特征,以及在岩石受力过程中损伤和空隙(或孔隙)中流体对应力-应变关系所起的作用。与试验结果的比较显示模型是合理的。
|
| 关 键 词： | 岩石力学 饱和、非饱和岩石 统计 损伤 软化 本构模型 |
| 文章编号： | 1000-6915(2004)增1-4285-07 |
| 修稿时间： | 2004年4月10日 |
STATISTICAL DAMAGE CONSTITUTIVE MODEL FOR SATURATED AND UNSATURATED ROCK |
| |
| Wei Lide,Xu Weiya,Yang Chunhe.STATISTICAL DAMAGE CONSTITUTIVE MODEL FOR SATURATED AND UNSATURATED ROCK[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(Z1):4285-4291. |
| |
| Authors: | Wei Lide Xu Weiya Yang Chunhe |
| |
| Affiliation: | Wei Lide1,Xu Weiya2,Yang Chunhe1 |
| |
| Abstract: | Based on probability statistics and damage mechanicst,he characteristics of failure and damage of rock are studied,and the statistical damage constitutive model of rock is developed.For stresses,only effective stresses are employed in the damage evolvement function.The residual strength property of rock can be considered in the model.Then the statistical damage constitutive model is developed for saturated and unsaturated rock based on the mixture theory.The model can reflect the segment of concave in the stress-strain curve at the initial loading phase in the uniaxial compression test of rock,and the influence of damage in compression process and fluid in the pores or void on the stress-stain curves.The presented model is verified to be reasonable and practical in comparison with the experiment data. |
| |
| Keywords: | rock mechanics saturated and unsaturated rock statistics damage softening constitutive model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
