(1. College of Architecture and Civil Engineering,North China University of Technology,Beijing 100144,China;
2. School of Transportation Science and Engineering,Beihang University,Beijing 100191,China)
Abstract:By using plane strength theory,unified strength formula based on the spatially mobiliaed plane(SMP) and Lade-Duncan criteria is derived. Combining with post-peak rock material mechanical properties of post-peak strain softening,considering post-peak internal friction angle ? as intermediate variables,residual strain ? is used to express the post-peak nonlinear elastic modulus E,and finally a unified nonlinear constitutive equation which can be also named as constitutive model of rock post-peak residual stress is established. Combining with triaxial test of typical fractured diorite porphyrite in Eastern area of Xiaoguanzhuang iron mine,simulated calculation of post-peak stress-strain relationship curves for different confining pressures by this model is conducted. The result shows that the post-peak constitutive relation of this study can simulate the experimental results well,so as to prove the rationality of the model and providing a new way to study the post-peak mechanical regular pattern of rock.
朱建明1,吴则祥1,张宏涛1,姚仰平2. 基于Lade-Duncan和SMP两种强度准则的岩石残余应力研究[J]. 岩石力学与工程学报, 2012, 31(8): 1715-1720.
ZHU Jianming1,WU Zexiang1,ZHANG Hongtao1,YAO Yangping2. STUDY OF RESIDUAL STRESS OF ROCK BASED ON LADE-DUNCAN AND SMP STRENGTH CRITERIA. , 2012, 31(8): 1715-1720.
江 强,朱建明,姚仰平. Lade-Duncan破坏准则在地基承载力计算中的应用[J]. 岩石力学与工程学报,2005,24(18):3 262-3 265.(JIANG Qiang,ZHU Jianming,YAO Yangping. Application of Lade-Duncan failure criterion to calculation of bearing capacity of foundation[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(18):3 262-3 265.(in Chinese))
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