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Search results for: SMALL STRAIN STIFFNESS ANISOTROPY

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Search results for: SMALL STRAIN STIFFNESS ANISOTROPY

  • Modelling tunnelling-induced deformation in stiff soils with a hyperelastic–plastic anisotropic model

    Publication

    - Acta Geotechnica - Year 2024

    In this paper, the tunnelling-induced deformation in anisotropic stiff soils is analysed using FE modelling. The influence of material description is investigated rather than an advanced simulation of the tunnelling method. A new hyperelastic– plastic model is proposed to describe the anisotropic mechanical behaviour of stiff highly overconsolidated soil. This model can reproduce the superposition of variable stress-induced anisotropy...

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  • Influence of anisotropic stiffness in numerical analyses of tunneling and excavation problems in stiff soils

    Publication

    - Year 2017

    In the stiff overconsolidated soil deposits anisotropy influences small and intermediate strain stiffness and hence it has important impact on the results of discplacement preditcions in soil-structure modelling. The authors developed a cross-anisotropic soil model which combines both stress dependent and micro-structural anisotropy. The model is based on the anisotropic hyperelastic kernel for small strain stiffness. Reference...

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  • Influence of soil anisotropic stiffness on the deformation induced by an open pit excavation.

    In this paper, the problem of deformation induced by an open pit excavation in anisotropic stiff soils is analysed by FE modelling. The presented research is focused on the influence of material model with anisotropic stiffness on the accuracy of deformation predictions as compared with the field measurements. A new hyperelastic-plastic model is applied to simulate anisotropic mechanical behaviour of stiff soils. It is capable...

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  • A hyperelastic model for soils with stress-induced and inherent anisotropy

    Publication

    In this paper, modelling of the superposition of stress-induced and inherent anisotropy of soil small strain stiffness is8presented in the framework of hyperelasticity. A simple hyperelastic model, capable of reproducing variable stress-induced9anisotropy of stiffness, is extended by replacement of the stress invariant with mixed stress–microstructure invariant to10introduce constant inherent cross-anisotropic component. A convenient...

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  • Some aspects of the constitutive modelling of natural fine grained soils

    Publication

    - Year 2013

    The monograph deals with selected problems of the constitutive modelling of natural fine grained soils commonly known as clays. The main idea is not to propose a unified model which is capable of describing all known features of mechanical behaviour of fine grained soils. Instead, separate models are proposed describing the mechanical behaviour of heavily overconsolidated, lightly overconsolidated and normally consolidated clays....

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