Discrete element method

This article employs the finite element method (FEM) to evaluate the local hydraulic losses in complex geometries discretized by unstructured mesh. The method is applied to the laminar flow of Newtonian fluid.

14p viyoko 01-10-2024 3 0   Download

This paper summarizes the basic principle of FEM and DEM, then reviews a number of possible direct coupling strategies between FEM and DEM together with potential applications in civil engineering. The second objective is to develop a model that combines these two above mentioned methods in a multi-scale approach.

12p vifilm 24-09-2024 2 1   Download

By using an extensive three-dimensional discrete element method, we numerically investigate the effects of lightweight particle content on the mechanical strength of the cylindrical aggregates, randomly composed of two different groups of primary particles: light (low stiffness) and heavy (high stiffness), and the stress contribution of the heavy-heavy, light-heavy, and light-light interactions on the mechanical behavior of such aggregates, subjected to the compression test by using a constant downward velocity.

11p vifaye 20-09-2024 1 1   Download

In this paper, we numerically study the mobility of an unsaturated gravitational-granular flow, occurring on a slope-break system that contains two regions: Inclined-upstream and horizontal-downstream areas, by using three-dimensional discrete element simulations.

10p vifaye 20-09-2024 3 1   Download

We numerically study the effects of the size polydispersity and the friction coefficient on the compressive strength of wet granules under a diametrical compression test by using discrete element simulations. The numerical method is coupled with the capillary cohesion law which is enhanced by the cohesive forces between grains in the pendular regime.

9p vifaye 20-09-2024 1 1   Download

This paper presents the upper bound limit analysis of a slope in cohesive-frictional soils using the node-based smoothed finite element method (NS-FEM). The soil slope was discretized as triangular elements and modeled as Mohr-Coulomb material with the associated flow rule.

14p vifaye 20-09-2024 3 1   Download

Bài báo "Nghiên cứu sự phá hủy của cấu kiện bê tông chịu nén và dầm bê tông chịu uốn 3 điểm dựa trên mô phỏng số, sử dụng phương pháp phần tử rời rạc (DEM)" sử dụng phương pháp phần tử rời rạc (Discrete Element Method DEM) để mô hình hóa cấu kiện vật liệu bê tông chịu nén và và dầm bê tông có xẻ rãnh chịu uốn 3 điểm. Qua đó, nghiên cứu và phân tích ứng xử cơ học, cũng như cơ chế phá hủy của vật liệu trong các trường hợp chịu lực khác nhau.

10p dathienlang1012 03-05-2024 3 1   Download

Bài viết Mô phỏng 3D vết nứt trong bê tông sử dụng ứng suất chính trong phương pháp phần tử rời rạc trình bày quá trình mô phỏng 3D vết nứt trong vật liệu bê tông sử dụng ứng suất chính trong phương pháp phần tử rời rạc (Discrete Element Method - DEM). Mã nguồn mở Granular Object Oriented (GranOO) đã được sử dụng.

11p viaudi 29-08-2022 9 2   Download

The present study focuses on the material behaviour before homogenisation. A grain-scale experimental characterisation is first performed in the laboratory.

7p christabelhuynh 29-05-2020 12 2   Download

This paper presents a numerical investigation on the flexural performance of a novel cementitious reinforced GEM-TECH material using finite element method. A discrete nonlinear FE model using the commercial software ANSYS was employed to model a steel-reinforced GEM-TECH beam.

12p tohitohi 19-05-2020 15 1   Download

The theory of polyhedral surfaces and, more generally, the field of discrete differential geometry are presently emerging on the border of differential and discrete geometry. Whereas classical differential geometry investigates smooth geometric shapes (such as surfaces), and discrete geometry studies geometric shapes with a finite number of elements (polyhedra), the theory of polyhedral surfaces aims at a development of discrete equivalents of the geometric notions and methods of surface theory. The latter appears then as a limit of the refinement of the discretization. ...

35p noel_noel 17-01-2013 46 7   Download