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Progressive failure mechanisms of geosynthetic-reinforced column-supported embankments over soft soil: Numerical analyses considering the cracks-induced softening

Wang, Heng (author), Chen, Feng (author), Shiau, Jim (author), Dias, Daniel (author), Lai, F. (author), Huang, Jianhua (author)

Cement-based columns in combination with geosynthetic reinforcement is a well-established soft ground improvement technique to enhance embankment stability. This paper aims to present a finite-element (FE) study based on a case history of a geosynthetic-reinforced column-supported (GRCS) embankment over soft soil. In this study, the columns...

journal article 2023

document

Accelerating multiscale finite element simulations of history-dependent materials using a recurrent neural network

Ghavamian, F. (author), Simone, A. (author)

FE² multiscale simulations of history-dependent materials are accelerated by means of a recurrent neural network (RNN) surrogate for the history-dependent micro level response. We propose a simple strategy to efficiently collect stress–strain data from the micro model, and we modify the RNN model such that it resembles a nonlinear...

journal article 2019

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Study of fundamental behaviour of extremely low strength Clay

Gómez Meyer, Eduardo (author)

Soil characterization of the upper 2 meters of the seabed is essential to optimize the design of hydrocarbon fields (mooring systems), wellheads, subsea completions, pipelines, anchors and mudmat foundations (Randolph, 2016). Additionally, it has an increasing importance for geohazard evaluation, particularly in submarine slides. In oceanic...

master thesis 2018

document

Slope failure simulations with MPM

Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)

The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method (MPM). Numerical case studies involving various slope angles, heterogeneity and rainfall infiltration are presented. It is demonstrated that, by utilising a constitutive model which encompasses, in a...

journal article 2017

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POD-DEIM model order reduction for strain softening viscoplasticity

Ghavamian, F. (author), Tiso, P. (author), Simone, A. (author)

We demonstrate a Model Order Reduction technique for a system of nonlinear equations arising from the Finite Element Method (FEM) discretization of the three-dimensional quasistatic equilibrium equation equipped with a Perzyna viscoplasticity constitutive model. The procedure employs the Proper Orthogonal Decomposition-Galerkin (POD-G) in...

journal article 2017

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Slope Failure Simulations with MPM

Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)

The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method. By utilising a constitutive model which encompasses, in a simplified manner, both pre- and post-failure behaviour, the majority of types of geotechnical slope failure can be observed in the simulations. This is...

journal article 2017

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The Myth of Softening behavior of the Cohesive Zone Model Exact derivation of yield drop behavior of wood

Van der Put, T.A.C.M. (author)

It is shown that the postulate of strain softening of the fracture stress is based on the error to regard the nominal stress to be the actual, ultimate stress, at the actual area of the fracture plan. Strain sof-tening called yield drop is elastic unloading of the actual elastic stress at the intact, not ltimate, elas-tic loaded part of the...

journal article 2015

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Multiscale analysis of damage using dual and primal domain decomposition techniques

Lloberas-Valls, O. (author), Everdij, F.P.X. (author), Rixen, D.J. (author), Simone, A. (author), Sluys, L.J. (author)

In this contribution, dual and primal domain decomposition techniques are studied for the multiscale analysis of failure in quasi-brittle materials. The multiscale strategy essentially consists in decomposing the structure into a number of nonoverlapping domains and considering a refined spatial resolution where needed. In multiscale analysis of...

conference paper 2014

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Viscoplasticity for instabilities due to strain softening and strain-rate softening

Wang, W.M. (author), Sluys, L.J. (author), De Borst, R. (author)

journal article 1997

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Discretization influence in strain-softening problems

Sluys, L.J. (author), Cauven, M. (author), De Borst, R. (author)

journal article 1995

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Fundamental issues in finite element analyses of localization of deformation

De Borst, R. (author), Sluys, L.J. (author), Muhlhaus, H.B. (author), Pamin, J. (author)

journal article 1993

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A generalisation of J2-flow theory for polar continua

De Borst, R. (author)

journal article 1993

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A non-linear finite element approach for the analysis of mode-I free edge delamination in composites

Schellekens, J.C.J. (author), De Borst, R. (author)

journal article 1993

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Wave propagation, localization and dispersion in a gradient-dependent medium

Sluys, L.J. (author), De Borst, R. (author), Muhlhaus, H.B. (author)

journal article 1993

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On the Role of Dispersive Waves in Strain-Softening Media

Sluys, L.J. (author), De Borst, R. (author)

conference paper 1992

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Localisation in a Cosserat continuum under static and dynamic loading conditions

De Borst, R. (author), Sluys, L.J. (author)

journal article 1991

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Nonlinear analysis of propagation of delamination near free edges

Schellekens, J.C.J. (author), De Borst, R. (author)

conference paper 1991

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A comparison of different crack models applied to plain and reinforced concrete

Feenstra, P.H. (author), De Borst, R. (author), Rots, J.G. (author)

conference paper 1991

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Numerical simulation of free edge delamination in graphite-epoxy laminates under uniaxial tension

Schellekens, J.C.J. (author), De Borst, R. (author)

conference paper 1991

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Analysis of concrete fracture in "direct" tension

Rots, J.G. (author), De Borst, R. (author)

journal article 1989