An Improved Duncan-Chang Constitutive Model for Sandstone Subjected to Drying-Wetting Cycles and Secondary Development of the Model in FLAC(3D)

作者：Wang, Zijuan; Liu, Xinrong; Yang, Xin^*; Fu, Yan

来源：ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, 2017, 42(3): 1265-1282.

DOI：10.1007/s13369-016-2402-1

• Sandstone
• Drying-wetting cycles
• Improved Duncan-Chang constitutive model
• Secondary development
• FLAC(3D)

Water-rock interaction refers to chemical, physical, and dynamic interactions between underground water and rock. Water-rock interactions take place everywhere from the Earth surface to great depths. Many geologic events and environmental changes are caused by the presence of water. To research the mechanical properties of sandstone subjected to drying-wetting cycles, this paper proposes an improved Duncan-Chang constitutive model capable of describing the initial compression phase and the post-peak residual phase of rock deformation. Based on compression tests, stress-strain curves of uniaxial and triaxial compression of sandstone subjected to drying-wetting cycles were obtained. Then a robust secondary development platform for the software is generated, and a Microsoft Visual C++ program is used to construct an improved Duncan-Chang constitutive model for sandstone. A dynamic link calculation program for this model is also presented. The secondary development constitutive model is used to perform simulated compression tests, and the numerical test results are very similar to data from physical uniaxial and triaxial compression tests.

• 出版日期2017-3
• 单位福建工程学院; 重庆大学