This paper presents a coupled elastoplastic constitutive model for predicting the hydraulic and stress-strain-strength behaviour of unsaturated soils. Hydraulic hysteresis in the water-retention behaviour is modeled as an elastoplastic process with the elastic region of the saturation degree. The effect of change in degree of saturation on the stress-strain-strength behaviour and the effect of ...

The aim of this work is to evaluate and to compare the elastic shakedown domain obtained by two different approaches, an incremental simulation realised with an elastoplastic constitutive law and a simplified method, in an axisymmetrical structure subjected to a cyclic thermal and mechanical loading. The elastoplastic model has been developed by Electricité De France and implemented in the Fini...

Experimental data are reported on the elastoplastic response of and moisture diffusion through a vinyl ester resin–montmorillonite clay nanocomposite with various amounts of filler. Two simple models are developed for the elastoplastic behavior of a nanocomposite and for the anomalous diffusion of penetrant molecules. Adjustable parameters in the constitutive equations are found by fitting the ...

A deformable terrain model in multi-domain dynamics using elastoplastic constraints: An adaptive approach Achieving realistic simulations of terrain vehicles in their work environment does not only require a careful model of the vehicle itself but the vehicle’s interactions with the surroundings are equally important. For off-road ground vehicles the terrain will heavily affect the behaviour of...

Numerical methods provide a new way for solving complex geotechnical engineering problems. Firstly, we review the emergence and development of numerical methods, introduce basic principles particle flow discrete element its application in engineering. After that, method servo combination cylinder loading plate is used, simulation three-dimensional rock triaxial unloading test carried out by PFC...

The temperature field distribution has a significant influence on structural performance, thermal deformation, and error compensation. To improve the prediction accuracy of spindle system, comprehensive model considering contact resistance (TCR) interfaces was established to analyze performance high-speed system in present work. An elastoplastic used calculate contacting areas loads interfaces,...

A semianalytical model is introduced to assess rolling contact fatigue problems in railway applications. The constitutive law based on the nonlinear kinematic and isotropic hardening of Chaboche–Lemaitre, which allows cyclic elastoplastic strain under surface be evaluated. much higher computational effectiveness comparison with finite element (FE) analyses quantified. Dang Van multiaxial criter...

On the basis of plastic bounding surface model, the damage theory for structured soils and unsaturated soil mechanics, an elastoplastic model for unsaturated loessic soils under cyclic loading has been elaborated. Firstly, the description of bond degradation in a damage framework is given, linking the damage of soil’s structure to the accumulated strain. The Barcelona Basic Model (BBM) was cons...

In this paper, the meshless integral method based on the regularized boundary integral equation [1] has been extended to analyze the large deformation of elastoplastic materials. The updated Lagrangian governing integral equation is obtained from the weak form of elastoplasticity based on Green-Naghdi’s theory over a local sub-domain, and the moving least-squares approximation is used for meshl...

A (microscopic) static elastoplastic field theory of dislocations with moment and force stresses is considered. The relationship between the moment stress and the Nye tensor is used for the dislocation Lagrangian. We discuss the stress field of an infinitely long screw dislocation in a cylinder, a dipole of screw dislocations and a coaxial screw dislocation in a finite cylinder. The stress fiel...