...M. Rafai; M. Tafili; Y. Dong; P. J. Vardon In this study, a newly developed rate-dependent thermo-plastic constitutive model was enhanced to incorporate thermally accelerated creep and implemented into the Plaxis finite-element code, enabling the simulation of the behaviour of a well-instrumented...

... the finite-element (FEM) simulation with the proposed implicit gradient plasticity model. The established FEM specimen, depicted in Fig. 2(a) , uses 3200 8-node plane strain elements. A confining pressure of 100 kPa is imposed, followed by displacement-controlled loading applied to the top boundary...

...Pin Zhang; Zhen-Yu Yin; Brian Sheil Elastoplastic theory is ubiquitous in engineering for modelling the mechanical behaviours of various materials such as metals and granular matter. Elastoplasticity allows computation of plastic strains and updated stresses with hardening parameters using explicit...

... the ultimate limit-state surface for a plasticity-based macroelement representation of deep foundations. The framework is used herein to investigate the horizontal efficiency of a well-documented piled foundation, and theoretical predictions are compared with results of fully coupled numerical analyses...

...G. Mortara The scope of this paper is to have an alternative to the use of an explicit plastic potential in elastoplastic models for soils. This is possible through the definition of a stress–dilatancy relationship and a simple expression for an auxiliary surface in lieu of a given expression...

... implemented. constitutive relations clays sands shear strength elasticity plasticity numerical modelling Gas hydrates are crystalline compounds combining hydrogen-bonded water molecules and gas molecules. Natural gas hydrates are formed under high-pressure and low-temperature conditions...

... the drained/undrained cylindrical cavity expansion problem. During the early stage, most solutions were based on the elastic-perfectly-plastic model (Vesic, 1972 ; Yu & Houlsby, 1991 ; Carter et al., 1986 ; Yu & Carter, 2002). To consider the plastic hardening/softening property of soil...

... of simulating the non-linear behaviour of granular soil–structure interface systems under three-dimensional loading conditions is proposed. The proposed constitutive model is a state-dependent elasto-plastic model, and it is formulated in the framework of two-surface plasticity and critical state soil mechanics...

... along the firm base. This paper focuses on assessing the stability of relatively flat undrained slopes using the methods of finite-element limit analysis and elastic−plastic finite-element analysis, which involve no a priori assumptions about the form or location of the critical failure mechanism...

... numerical modelling plasticity The study of cyclic soil behaviour has attracted significant attention in the past decades. The offshore industry has enormously contributed to this field, as basically all marine structures must withstand environmental cyclic loads of variable amplitude, frequency...

... of the vertical plastic collapse load of a rigid shallow strip footing resting on a purely frictional material with no lateral surcharge. A comparison with results from finite-element analyses confirms the correctness of the approach. If the general cross-section of a plane strain problem is referred...

...M. Mánica; A. Gens; J. Vaunat; D. F. Ruiz A cross-anisotropic formulation for elasto-plastic constitutive models based on a non-uniform scaling of the stress tensor is described. Taking advantage of the material symmetries characterising cross-anisotropy, only two scaling factors, one...

... of drilled displacement piles. This note presents an analysis of the influence of shear stress on cylindrical cavity expansion in an undrained elastic–perfectly plastic soil. The problem is formulated by assuming large strain in the plastic zone and small strain in the elastic zone around the cavity...

...^/2, the equations can be written as ICE Publishing: all rights reserved 2014 anchors clays offshore engineering plasticity Cassidy et al. (2012) discussed the effect of the padeye offset on the bearing capacity (detrimental) and loss of embedment during the keying process...

...N. C. Consoli; D. Foppa The adequacy of the porosity/cement ratio in predicting elastic and plastic characteristics of an artificially cemented soil under isotropic compression is examined. A number of isotropic compression tests, unconfined compression tests and characterisation tests were carried...

... where δ_ij is the Kronecker delta. The following generalised stress and strain invariants are used where H  =  H(γ^{p)  =  h(σ + p) (with h = dμ/dγp) is the plastic hardening modulus, which is related to the tangent modulus}...

... & Sands, 2007b) is extended for use in this model, such that 14 5 2012 14 6 2012 21 8 2012 ICE Publishing: all rights reserved 2012 compaction constitutive relations friction numerical modelling plasticity sands The densification of granular materials...

... et al., 2009). constitutive relations deformation numerical modelling plasticity Figure 1 shows the current modelling and characterisation paradigms at the grain scale and at the continuum scale. While significant progress has been made using continuum and discrete paradigms...

... graph, characterising the range of plastic deformation of interest, can only occur by a few generic mechanisms – flips (Edelsbrunner, 2000). Only one generic flip exists in 2D, the 2–2 flip, as illustrated in Fig. 2 . The name indicates the numbers of original and final cells in the generic...

...: all rights reserved 2012 deformation laboratory tests plasticity shear strength stiffness Knowledge of soil stiffness and stress–strain behaviour is essential to the calculation of ground displacements that may damage structures. These serviceability considerations, termed SLS...