Comparison of model predictions of the anisotropic plasticity of Lower Cromer Till

Yang, Chao; Carter, John; Yu, Shengbing

doi:10.1016/j.compgeo.2015.06.009

Cited by 9 publications

(10 citation statements)

References 29 publications

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“…In addition to determining the relative magnitude of plastic strain increments, the PPS also specifies the ultimate strength. Although some studies suggest that using identical YS and PPS is a feasible assumption for constitutive models with an oriented YS 19,36,50 , it was found that employing associated flow rule leads to unrealistic simulations 12,18,37–39,51 . Yu 18 showed that models using associated flow rule fail to predict the undrained response of normally consolidated undisturbed clays with softening and pre‐failure peak strengths.…”

Section: Model Formulationmentioning

confidence: 99%

“…Yu 18 showed that models using associated flow rule fail to predict the undrained response of normally consolidated undisturbed clays with softening and pre‐failure peak strengths. Taking this point into account, several recently developed models employ the non‐associated flow rule in their formulation 16,17,37–39,52 …”

Section: Model Formulationmentioning

confidence: 99%

“…This methodology for representing the inherent anisotropy has its roots in the works of Sekiguchi and Ohta, 30 and Hashiguchi, 31 and were subsequently followed by other researchers 17,21,32–40 . In these works, the inclined YS is either fixed 30,41 or variable by adopting a rotational hardening (RH) rule to simulate the development or erasure of anisotropy during plastic straining 17,36–39,42–46 . How plastic strain components participate in rotating the YS is one of the key aspects in proposing different RH rules.…”

Section: Introductionmentioning

confidence: 99%

“…A popular approach in considering the effects of inherent anisotropy within an elastoplastic modeling framework is development of elastoplastic soil constitutive models that involve inclined yield curves 25–29 . This methodology for representing the inherent anisotropy has its roots in the works of Sekiguchi and Ohta, 30 and Hashiguchi, 31 and were subsequently followed by other researchers 17,21,32–40 . In these works, the inclined YS is either fixed 30,41 or variable by adopting a rotational hardening (RH) rule to simulate the development or erasure of anisotropy during plastic straining 17,36–39,42–46 .…”

Section: Introductionmentioning

confidence: 99%

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Adaptive anisotropic constitutive modeling of natural clays

Dejaloud

Rezania

2021

Num Anal Meth Geomechanics

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In this paper, an adaptive anisotropic constitutive model, namely AA1‐CLAY, is developed for clays based on the critical state framework. The model has a non‐associated flow rule, and it can also reduce to basic critical state constitutive models. A versatile yield surface (YS) is implemented in the model which can generate a broad range of shapes to improve the possibility of capturing experimental yield points of different clay types with high accuracy. In addition to the isotropic hardening rule, an innovative rotational hardening (RH) rule is also incorporated into the model to control the YS rotation rate. The proposed RH rule uses a transitional function to govern the effect of plastic strains at different constant stress ratios more realistically. Furthermore, the equilibrium state of anisotropy, which the YS tends to reach during plastic straining, is defined uniquely based on the experimental findings. The detailed model formulation is presented, and important features of the model are elaborately discussed. The capabilities of the model are also demonstrated by comparing the simulation results of several element tests on a number of different clays against the available experimental data.

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Section: Model Formulationmentioning

confidence: 99%

Section: Model Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adaptive anisotropic constitutive modeling of natural clays

Dejaloud

Rezania

2021

Num Anal Meth Geomechanics

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“…The stress paths for the model of have been reproduced for the undrained triaxial compression and tension tests, again their model was calibrated on the same dataset, , as used in this paper. For comparisons of the LCT data with other constitutive models the reader is referred to .…”

Section: Physical Comparisonsmentioning

confidence: 99%

Continuously unique anisotropic critical state hyperplasticity

Coombs

2016

Int. J. Numer. Anal. Meth. Geomech.

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Summary This paper presents the theoretical development and methodological motivation of a single surface anisotropic hyperplasticity model. The model extends the isotropic family of models developed by Coombs and Crouch by: (i) introducing anisotropic shearing into the yield surface, (ii) relating two of the material constants to a single physical quantity and (iii) using a more physically realistic pressure sensitive elastic free energy function. This model overcomes the difficulty of determining the constants of the isotropic two‐parameter surface by analytically relating them to a single experimentally measurable physical quantity, namely the normalised hydrostatic position of the Critical State. This provides a model with a Critical State surface that is constant throughout the loading process, invariant of the level of anisotropy inherent in the yield envelope. The model is compared with experimental data from triaxial tests on Lower Cromer Till, contrasted against the SANIclay model and the recent model of Yang et al. (2015) as well as being compared with rarely considered experimental data from hollow cylinder tests on London Clay. Copyright © 2016 John Wiley & Sons, Ltd.

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Constitutive modelling of Otaniemi soft clay in both natural and reconstituted states

Yang

Liu

et al. 2015

Computers and Geotechnics

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Comparison of model predictions of the anisotropic plasticity of Lower Cromer Till

Cited by 9 publications

References 29 publications

Adaptive anisotropic constitutive modeling of natural clays

Adaptive anisotropic constitutive modeling of natural clays

Continuously unique anisotropic critical state hyperplasticity

Constitutive modelling of Otaniemi soft clay in both natural and reconstituted states

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