Particle flow simulation of constitutive behavior of sands. Issue 7 (April 2020)

• Record Type: Journal Article
• Authors: Zhang, Weihua; Zhao, Chenggang; Zhang, Yinping
• Is Part Of: IOP conference series. Volume 474:Issue 7(2020)
• Publication Date: 2020-04
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/474/7/072076
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Particle Flow Code, based on the method of discrete element, overcomes the hypothesis of macroscopic continuum in traditional mechanics model, and can simulate the properties of sands with the linear and the hertz-mindlin contact model in microscopic level. Triaxial shear test of sands is simulated by PFC2D biaxial confined test, and then the effects of microscopic parameters, such as the shear modulus, poisson's ratio, particle radii, particle shape, contact stiffness, etc., and the confining stress on the macroscopic mechanical properties of sands (dilatancy, phase transformation, fabric, etc.) have been discussed. And finally the microscopic parameters of sand have been calibrated for further study by two contact models respectively.