A critical state two-surface plasticity model for gravelly soil-structure interfaces under monotonic and cyclic loading

2016 ◽  
Vol 80 ◽  
pp. 71-82 ◽  
Author(s):  
Miad Saberi ◽  
Charles-Darwin Annan ◽  
Jean-Marie Konrad ◽  
Ali Lashkari
Keyword(s):  
Cyclic Loading ◽  
Critical State ◽  
Soil Structure ◽  
Plasticity Model ◽  
Surface Plasticity ◽  
Gravelly Soil

Isotropic–kinematic hardening model for coarse granular soils capturing particle breakage and cyclic loading under triaxial stress space

2016 ◽  
Vol 53 (4) ◽  
pp. 646-658 ◽  
Author(s):  
Qingsheng Chen ◽  
Buddhima Indraratna ◽  
John P. Carter ◽  
Sanjay Nimbalkar
Keyword(s):  
Cyclic Loading ◽  
Critical State ◽  
Kinematic Hardening ◽  
Plasticity Theory ◽  
Particle Breakage ◽  
Granular Soils ◽  
Stress Space ◽  
Bounding Surface ◽  
Bounding Surface Plasticity ◽  
Surface Plasticity

In this paper, a simple but comprehensive cyclic stress–strain model that incorporates particle breakage for granular soils including ballast and rockfill has been proposed on the basis of bounding surface plasticity theory within a critical state framework. Particle breakage and its effects are captured by a critical state line that is translated in voids ratio–stress space according to the dissipated energy (plastic work), through a hyperbolic function. A comprehensive equation related to particle breakage is proposed for the stress–dilatancy relationship to capture the complex dilatancy of granular soils. By extending Masing’s rule to bounding surface plasticity theory and introducing a generalized homological centre, a combined isotropic–kinematic hardening rule and a mapping rule have been established to simulate more realistically the response of gravelly soils under cyclic loading. The applicability and accuracy of this model are demonstrated by comparing its predictions with experimental results for different types of granular soils, including rockfill, under both monotonic and cyclic loading conditions. This study shows that the model can capture the characteristic features of coarse granular soils under complex loading paths.

A critical state two-surface plasticity model for sands

Géotechnique ◽  
1997 ◽  
Vol 47 (2) ◽  
pp. 255-272 ◽  
Author(s):  
M. T. Manzari ◽  
Y. F. Dafalias
Keyword(s):  
Critical State ◽  
Plasticity Model ◽  
Surface Plasticity
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