Open AccessParticle flow simulation of constitutive behavior of sands
Author(s) -
Weihua Zhang,
Cheng Zhao,
Yinping Zhang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/474/7/072076
Subject(s) - discrete element method , dilatant , triaxial shear test , particle flow , mechanics , materials science , shear modulus , stiffness , contact mechanics , geotechnical engineering , particle (ecology) , constitutive equation , contact force , direct shear test , shear (geology) , finite element method , classical mechanics , composite material , structural engineering , geology , physics , engineering , oceanography
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.