Open AccessThe modified cyclic multi-surface plastic model of sandy soil based on damping ratio
Author(s) -
Yan Zhang,
Shulin Sun,
You Qin
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 - 10.1088/1755-1315/560/1/012090
Subject(s) - hardening (computing) , materials science , plasticity , anisotropy , isotropy , strain hardening exponent , bauschinger effect , composite material , shear (geology) , mechanics , geotechnical engineering , geology , physics , optics , layer (electronics)
Traditional multi-surface plastic model always overestimates the accumulated plastic strain when it is applied into sandy soil under cyclic loading. Considering this overestimation can be reflected through equivalent damping ratio of the hysteretic loop and the damping ratio can also include the real anisotropic plastic hardening which is simply considered in kinematic hardening rule and isotropic hardening rule, series of strain-controlled cyclic simple shear tests were conducted to obtain the relationship between correction coefficient of hardening rule and initial state including initial effective, then a modified cyclic multi-surface plastic model was established by regarding the subsequent hysteretic loop as the new first loop with a new initial state which is the state at the start of the fourth quarter of the previous loop, thus, the plastic hardening formula can be upgraded in the process of loading.