The effects of initial deviatoric stress on anisotropy of marine clay and strain components

Zhuang, Heng; Li, Mingfeng; Wang, Chaoliang; Guo, Lin; Zhang, Dikang; Du, Hongke; Du, Yunguo

doi:10.1080/1064119x.2020.1818151

Cited by 4 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 9 ] conducted cyclic triaxial tests on Zipingpu gravel and successfully employed the discrete element method to study the stress–dilatancy relationship of gravelly soils, whereas Sze and Yang [ 10 ] investigated the influence of the specimen preparation on the deformation behaviour of saturated sands under cyclic loading. Zhuang et al [ 11 ] studied the effects of the initial deviatoric stress state and principal stress orientation on the strain components and shear strength of soft marine clay. Yang et al [ 12 ] reported a comprehensive experimental investigation of the undrained cyclic behaviour of saturated loose sand with static shear, under triaxial compression and extension conditions.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Bounding Surface Model for Modelling Various Cyclic Behaviour of Clay

et al. 2022

View full text Add to dashboard Cite

Many results from cyclic triaxial experiments indicate that porous media, such as clays, exhibit various long-term behaviours under different cyclic stress ratios (CSRs). These can be classified into three main categories, namely, cyclic shakedown, cyclic stable and cyclic failure. Modelling these soil deformation responses, along with pore pressure and other fundamental cyclic aspects, such as closed hysteresis cycles and degradation, is still an open challenge, and research to date is limited. In order to properly describe and capture these characteristics, an enhanced plasticity model, based on the bounding surface and stress distance concepts, is developed here. In detail, a new uniform interpolation function of the plastic modulus, suitable for all loading stages, is proposed, and a new damage factor associated with the plastic shear strain and the deformation type parameter, is also incorporated into the plastic modulus. Accordingly, cyclic shakedown and cyclic failure can be distinguished, and degradation is achieved. Closed hysteresis loops, typical of clays, are obtained through a radial mapping rule along with a moving projection centre, located by the stress reversal points. Comparisons between the obtained numerical results and the experimental ones from literature confirm the suitability of the constitutive approach, which is capable of correctly capturing and reproducing the key aspects of clays’ cyclic behaviour.

show abstract