Premium
Elastoviscoplastic modelling with distorted isotaches and swelling for constant strain rate and incremental loading
Author(s) -
Vergote Thomas A.,
Leung C. F.,
Chian S. C.
Publication year - 2021
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.3248
Subject(s) - creep , swelling , stress relaxation , materials science , strain rate , distortion (music) , constant (computer programming) , stress (linguistics) , viscoplasticity , mechanics , relaxation (psychology) , coupling (piping) , transient (computer programming) , stress path , process (computing) , deformation (meteorology) , structural engineering , finite element method , composite material , computer science , constitutive equation , engineering , plasticity , physics , programming language , philosophy , cmos , amplifier , linguistics , operating system , psychology , social psychology , optoelectronics
A novel elastoviscoplastic model is proposed to improve the modelling of the one‐dimensional unloading response of soils. Creep is modelled as an isotache process, but with the possibility to incorporate distortion of the isotaches after unloading. Upon unloading, swelling develops as a transient superimposed process that enables the sequential occurrence of swelling and creep as observed in experiments. The model features a flexible reference isotache to improve the fit to real laboratory tests. The model is implemented with full hydro‐mechanical coupling and enables simulation of both load‐controlled and strain rate‐controlled stress paths. The model is calibrated with a laboratory test with a complex stress path including constant rate of strain, incremental loading and relaxation stages.