长江科学院院报2017，Vol.34Issue(7)：87-93,7.DOI:10.11988/ckyyb.20160388
岩石卸荷力学特性及本构模型研究进展
Research Progress of Mechanical Characteristics andConstitutive Model of Rock under Unloading Condition
摘要
Abstract
In recent years, scholars have made plenty of researches on the mechanical characteristics and constitutive models of unloading rock through the unloading tests of rock specimen.Also, substantial achievements have been obtained.Compared with loading condition, rock performs differently in many aspects under unloading condition, such as strength characteristics, deformation regularities and failure modes.Unloading rock has significant tensile cracks and volume dilatation, and always performs as tensile-shear failure.Moreover, deformation and failure mechanism are impacted greatly by unloading speed, confining pressure and stress path.The constitutive models of unloading rock can be divided into phenomenological constitutive model and micro-mechanical constitutive model.The former does not consider the failure evolution mechanism of unloading rock, while the latter does not consider the micro crack groups and the error caused by mathematical simplification.These scientific problems make the future of unloading rock mechanics research work full of opportunities and challenges.关键词
岩石力学/卸荷试验/变形特征/破裂特征/本构模型Key words
rock mechanics/unloading test/deformation feature/fracture characteristics/constitutive model分类
建筑与水利引用本文复制引用
李建贺,盛谦,朱泽奇,牛利敏,阮航..岩石卸荷力学特性及本构模型研究进展[J].长江科学院院报,2017,34(7):87-93,7.基金项目
国家重点基础研究发展计划(973)项目(2015CB057905) （973）
国家自然科学基金面上项目(51279202) （51279202）
NSFC-云南联合基金重点支持项目(U1402231) （U1402231）
