...Yumeng Qi; Mark Fraser Bransby; Conleth D. O’Loughlin Strain localisation widths in sand are known to be controlled by the particle size, such that their magnitude can be readily determined. However, there is less certainty on how to select appropriate widths for localisations in clays. This poses...

... tests micro-CT tomography strain strain localisation tunnelling and pipes X-ray tomography Fig. 1. Experimental set-up. Soil specimen placed inside scanning region. Pressure and volume monitored during expansion steps and scanning A Cartesian coordinate system is used in which...

... COx clay-stone finite-element methods fractured zone non-local numerical modelling sensitivity analysis strain localisation tunnels A detailed simulation of the excavation of one of the tunnels at the Meuse/Haute-Marne (MHM) underground research laboratory (URL), located in the Callovo...

..., with focusing distance around 200 mm and a field of view of approximately 35 × 45 mm. The scaling factor from pixel level to object level was 30 μm/pixel. 02 02 2015 03 08 2015 © 2015 Thomas Telford Ltd 2015 failure laboratory tests rocks/rock mechanics strain localisation...

..., even to carry out predictive modelling, provided an adequate calibration is available for the material parameters. © 2015 Thomas Telford Ltd 2015 creep landslides pore pressures; shear strength strain localisation temperature effects Large catastrophic landslides are a constant...

...J. Zhao; N. Guo This paper presents a multiscale investigation on the interplay among inherent anisotropy, fabric evolution and strain localisation in granular soils, based on a hierarchical multiscale framework with rigorous coupling of the finite-element method (FEM) and discrete-element method...

... modelling landslides slopes strain localisation Large-scale landslides in sensitive clays are common in eastern Canada and Scandinavia. Most of these slides are progressive in nature. The post-peak softening of sensitive clays is considered as one of the main reasons for progressive failure...

... of net stress and suction variables is implemented. The instability of a slope subjected to rain infiltration, inspired from a real case, is solved and discussed. The model shows the development of the initial failure surface in a region of deviatoric strain localisation, the evolution of stress...

...C. DI PRISCO; F. PISANÒ In this paper the stability of an infinitely long granular slope is addressed in the framework of small-strain perfect elastoplasticity. The problem is approached by discussing the condition of strain localisation and, through a reinterpretation of the concept of ‘angle...

... effectifs sur le champ. case history dams numerical models pore pressures strain localisation This paper presents a simulation of the Aznalcóllar dam failure using the material point method (MPM; Sulsky et al., 1994, 1995 ; Sulsky & Schreyer, 1996). MPM combines...

... des champs de déformation et contrainte incrémentiels, en superposant des images correspondantes. deformation model tests retaining walls strain localisation stress analysis The validation of constitutive models requires, ideally, information not only about external boundary...

.... fabric/structure of soils model tests particle crushing/crushability piles sands strain localisation time dependence Recent laboratory model investigations provide further insights into the influences of state, particle crushing, abrasion at the pile–sand interface and cyclic shaft loading...

... to the particle size) on the bulk material shear strength and shear banding behaviour in the direct shear test. A mesh-free strain calculation method previously developed by the authors was used to capture and visualise the evolution of strain localisation inside the direct shear box. Simulation results show...

.... Such information is useful in calibrating constitutive models that deal with assessment of the influence of specimen heterogeneity on the onset of strain localisation (e.g. Alsaleh et al., 2006). First, a representative elementary volume (REV) needs to be identified in preparation for calculating...

... possible to observe material behaviour at smaller scales. Strain localisation in the form of shear bands is a common deformational feature associated with instability and failure in granular soils. For predictive purposes, the phenomenon of shear banding poses challenges, given that its length scale...

... présente et discute un récapitulatif statistique détaillé de l'épaisseur de la bande de cisaillement et de la variation du degré de porosité dans l'intégralité de la bande de cisaillement. fabric/structure of soils microscopy strain localisation The constitutive behaviour of soils is highly...

... l'étude des effets des conditions expérimentales qui n'avaient pas été examinés jusqu'ici. Mechanical testing of granular materials frequently reveals instabilities in the form of strain localisation or shear bands that have an important influence on the observed mechanical response. Much analysis...

... défaillance déduite de la simulation numérique, se sont avérés très similaires à ceux que l'on a observés. failure numerical modelling and analysis slopes strain localisation The stability analysis of slopes in soils with strain-softening behaviour is a very complex problem. As is known...

... and, in particular, a constitutive law of the form given by Tordesillas & Walsh (2002) (Peters & Horner, 2002). 17 12 2003 16 03 2004 © 2004 Thomas Telford Ltd 2004 constitutive relations deformation fabric/structure of soils failure strain localisation Continuum...