Nowadays acoustic emission (AE) testing based on the Kaiser Effect (KE) is increasingly used to estimate the in-situ stress in laboratories. In this work, this effect is assessed on cylindrical specimens in numerical simulations of the cyclic loadings including loading, unloading, and re-loading cycles using a 3D code called the particle flow code (PFC) based upon the distinct element method. T...

Numerical investigation of mixed convection flow in a concentration-stratified fluid-saturated vertical square porous enclosure is investigated by Galerkin finite element method. The forced flow conditions are imposed by providing an inlet at the bottom wall and an outlet with a suction on the top wall. The free convection is induced by introducing a hot but isothermal temperature on the left v...

Geosynthetics have proved to be suitable for reinforced soil retaining walls. Based on the increasing uses of geosynthetic reinforced soil systems in the regions, which bear frequent earthquakes, the study of dynamic behavior of structures seems necessary. Determining the reinforcement forces is; therefore, one of the most important and main points of discussions in designing retaining walls, b...

Most of the infrastructure investments and earthworks not requiring deep foundations are usually designed in vadose zone to avoid excessive groundwater-structure interactions. The mechanical behaviour soil material, under partially saturated conditions, is greatly influenced by pore-water tension, known as suction, characteristics Soil Water Retention Curve (SWRC). In present paper, SWRC a silt...

‎in this article‎, we use a finite difference technique‎ ‎to solve variable-order fractional integro-differential equations‎ ‎(vofides‎, ‎for short)‎. ‎in these equations‎, ‎the variable-order fractional integration(vofi) and‎ ‎variable-order fractional derivative (vofd) are described in the‎ ‎riemann-liouville's and caputo's sense,respectively‎. ‎numerical experiments‎, ‎consisting of two exam...

A three-dimensional multi-scale discrete–continuum model (Finite Volume Method × Discrete Element Method, FVM DEM) is developed for a discrete-based description of the mechanical behavior granular soils in boundary value problems (BVPs). In such scheme, constitutive response material derived through direct DEM computations on representative volume element attached to each mesh element. The appr...