A Study of the Statistical Damage Constitutive Model of Rocks Considering a Full Deformation Process
详细信息
- 责任者：Wang Huiping (Geotechnical Engineering Institute of Hunan University ; Changsha 410082 ; China) ; Cao Wengui
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2013
- 卷期：40(4)
- 关键词：岩体力学 ; rock mechanics
- 页码：p.44-49
- 图表：illus., 16 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
It is one of the hot spots in geotechnical engineering to establish a new statistical damage constitutive model which can be used to simulate a full deformation process of rocks.Based on discussing the deformation characteristics at every stage in a full deformation process of the strain softening rock and aiming at some deficiencies of strain-equivalence hypothesis suggested by Lemaitre,a new damage model for rocks is proposed according to more reasonable hypothesis,which may reflect the characteristics of residual strength after failure and volume change.By adopting the statistical damage theory and considering the influences of damage threshold on the transformation of rocks,a new statistical damage constitutive model s established,which can be used to simulate the full deformation process of strain softening rock.This model may reflect the influence of volume change and initial voids ratio on the transformation of rocks.The analyses with practical examples and homologous models indicate that the constitutive model presented in this paper is reasonable and preponderant.