A Multilaminate Model with Destructuration Considering Anisotropic Strength and Anisotropic Bonding

Galavi, Vahid; Schweiger, Helmut

doi:10.3208/sandf.49.341

Cited by 10 publications

(3 citation statements)

References 26 publications

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“…Based on the Mohr-Coulomb yield criterion, in the finite element calculation, the value of the friction angle at each integral point is regarded as a function of the shear stress direction, and it is developed into a yield criterion that can consider the anisotropy of the friction angle. For the calculation of the friction angle, the calculation formula proposed by Schweiger [58,59] is derived from the fabric tensor A proposed by Pietruszczak and Mroz [60] from the microscopic point of view. For orthotropic materials, A can be expressed by Equation (24):…”

Section: Friction Angle Anisotropymentioning

confidence: 99%

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Zhuang,

Chen,

Wang

et al. 2023

Applied Sciences

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It is an economical way to use the pile-supported embankment for the construction of the embankment over soft soil. The combined use of piles and reinforcement effectively reduces the differential settlement of the embankment surface. However, the previous analysis of embankment stress and settlement did not take into account the anisotropy in the embankment filler. In this paper, the UMAT subroutine is developed by using the material subroutine interface in ABAQUS 2016 finite element software. The anisotropy of soil cohesion and friction angle has been incorporated into the Mohr–Coulomb yield criterion so that it can consider the anisotropy of soil. The accuracy of the anisotropic yield criterion in this paper is verified by an ABAQUS source program and related engineering examples. It is found that the anisotropy value of soil cohesion is inversely proportional to the stress ratio on the pile–soil interface while being directly proportional to the tensile stress applied to the geogrid. The results show that the anisotropy of the friction angle decreases with the soil arching effect but increases by 23.1% with the tensile stress on the geogrid. The position of the settlement plane remains relatively constant at 2.3 m as the friction angle anisotropy coefficient increases. These research results provide valuable theoretical guidance for on-site construction design.

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Section: Friction Angle Anisotropymentioning

confidence: 99%

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Zhuang,

Chen,

Wang

et al. 2023

Applied Sciences

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“…To tackle this problem, a micromechanical modeling appears to be a suitable tool. The approach is based on a homogenization technique in order to derive the stressstrain relationship of the granular assembly from forces and displacements at the particle level [17][18][19][20][21][22][23][24][25][26][27][28][29]. Along these lines, Chang and Hicher [27] have proposed a model for granular materials based on the development of micromacro links between strain and inter-particle displacements on one hand, and stress and inter-particle forces on the other hand, which allow both the micro-system (intergranular forces and displacements) and the macro-system (overall stress-strain) to be in balance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of cement-treated clay behavior by micromechanical approach

Zhang

Yin

Hicher

et al. 2013

Front. Struct. Civ. Eng.

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International audienceExperimental results show the significant influence of cement content on the mechanical properties of cement-treated clays. Cementation is produced by mixing a certain amount of cement with the saturated clay. The purpose of this paper is to model the cementation effect on the mechanical behavior of cement-treated clay. A micromechanical stress-strain model is developed considering explicitly the cementation at inter-cluster contacts. The inter-cluster bonding and debonding during mechanical loading are introduced in two ways: an additional cohesion in the shear sliding and a higher yield stress in normal compression. The model is used to simulate isotropic compression and undrained triaxial tests under various confining stresses on cement-treated Ariake clay and Singapore clay with various cement contents. The applicability of the present model is evaluated through comparisons between numerical and experimental results. The evolution of local stresses and local strains in inter-cluster planes are discussed in order to explain the induced anisotropy due to debonding at contact level under the applied loads. The numerical simulations demonstrate that the proposed micromechanical approach is well adapted for taking into account the main physical properties of cement-treated clay, including damage and induced anisotropy under mechanical loading

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“…It is herein proposed to introduce two independent yielding processes (i.e., volumetric by the bonding mechanism and deviatoric by the frictional mechanism) together with a coupling (interactive) mechanism between them (i.e., the interactive double-yield concept) to describe the yield property of cement-mixed GMs. In the multi-laminate framework proposed by Galavi and Schweiger (2009), the rheological model, even though comprising two submechanisms for each integration plan, failed to consider any potential coupling.…”

Section: Shape Of Yield Locusmentioning

confidence: 99%

Ageing Effects on the Yielding Characteristics of Cement-Mixed Granular Materials

Ezaoui

Tatsuoka

Sano

et al. 2010

Soils and Foundations

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Ageing eŠects on the elasto-viscoplastic property of compacted moist cement-mixed granular material (GM) were evaluated by performing a series of non-standard drained triaxial compression (TC) tests. Two types of GM, crushed gravelly soil from a quarry and crushed concrete aggregate (i.e., a recycled material), were used. The specimens were produced by moist-compaction and then cured at constant water content under unstressed conditions for seven days. They were re-cured basically for two days under diŠerent stress states during otherwise drained TC loading at a constant strain rate. Yielding characteristics upon the restart of drained monotonic loading (ML) at a constant strain rate toward ultimate failure at the same or increased or decreased conˆning pressure were evaluated. The stress-strain behaviour before the stress state reaches the current yield locus is very stiŠ and highly reversible. Unlike elasto-plastic materials exhibiting no ageing eŠects, the yield locus expands during sustained loading at aˆxed eŠective stress state due to not only yielding associated with creep deformation, controlled basically by the viscous property, but also ageing, controlled basically by time-elapsing. The shape and location of current yield locus depends on the location of the current stress state relative to the current ultimate failure envelope. The observed yield characteristics were analyzed based on a newly introduced interactive double-yield concept while in the framework of the non-linear threecomponent elasto-viscoplastic model that takes into account ageing eŠects as well as an interaction between ageing and inviscid yielding (and its potential decay by irreversible straining). The trends of stress-strain-time behaviour observed with the two types of cement-mixed GMs are essentially the same.

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A Multilaminate Model with Destructuration Considering Anisotropic Strength and Anisotropic Bonding

Cited by 10 publications

References 26 publications

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Evaluating Pile-Supported Embankment Considering the Soil Anisotropy Effect

Analysis of cement-treated clay behavior by micromechanical approach

Ageing Effects on the Yielding Characteristics of Cement-Mixed Granular Materials

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