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discrete element method

Compiling C++14 code on a cluster with clang

For those of you who have to port codes to supercomputers:

New article: Compling C++14 code on a cluster.  http://www.parresianz.com/dem/compiling-paraellip3d-for-a-cluster/

-- Biswajit

mac's picture

DEM Open Forum and ESyS-Particle Workshop

DEM Open Forum and ESyS-Particle Workshop

University of Glasgow

Wed., 30/08/2017, 8:30 am – Fri., 01/09/2017, 5:00 pm 

Arttu Polojärvi's picture

Doctoral Candidate Position in Computational Ice Mechanics

We are looking for a doctoral student to join our Arctic Marine and Ice Technology research group at the Aalto University (Finland), Department of Mechanical Engineering, to study ice-structure interaction process in shallow water using numerical simulations.  In the complex ice-structure interaction process an intact ice sheet fails into discrete ice blocks, which affect further stages of the process. Realistic calculations of ice loads due to this process require modeling of the ice blocks and their pile-up process.

dphull's picture

Underwater Soil Mechanics Problem

I am an undergraduate student conducting a research project involving the design of a tool to aid astronauts to perform experiments on lunar surfaces and would like to request some direction about which analytical tools would be best suited for this application (i.e. FEA or DEM software/techniques). The specific scenario of interest is to design a tool that can act as an anchor in a sand-like medium (regolith) on the surface of the moon.

Shailendra's picture

Post-doctoral positions at National University of Singapore (NUS) and Singapore University of Technology and Design (SUTD)

Starting April 2016, we will have openings for two post-doctoral fellow positions in experimental and computational mechanics of advanced polymers. These positions will support a new research program between Singapore University of Technology and Design (SUTD) and National University of Singapore (NUS) funded by Agency for Science, Technology and Research (A*STAR). The project focuses on synthesizing, characterizing, modeling, and simulating the thermo-mechanical behavior of polymers with covalent adaptable networks (CANs), e.g. vitrimers.

davm5's picture

Impact Force plotting using Abaqus/Explicit

Hello Everyone

I am trying to simulate material dumping process from shovel onto mining dump truck. And for that i am using Abaqus/Explicit.  When i plot the contact force of material falling onto truck body under gravity, it gives me the maximum value of 0.12e+11, where as a simple theoretical analysis shows that the resulting impact force for 100 tons of material falling under gravity should be 9e5 N. I am not been able to understand the reason that why Abaqus /Explicit is exaggerating the impact/contact force so much. And i dont know how to correct this thing.

jkruzic's picture

Two postdoctoral positions in Mechanics of Materials at Oregon State University

We are seeking to fill two postdoctoral scholar positions at Oregon State University. The ideal candidates will have expertise in one or more of the following: computational materials science, granular mechanics, solid mechanics, and/or mechanical testing of materials. Positions will initially be for 1 year with an anticipated starting date of January 1st, 2015, with the possibility to continue for a second year depending on performance and continued funding.

The successful candidates will:

Research Associate in 4D Image based quantification and simulation

An excellent opportunity to work in a world leading team with privileged access to facilities that most researchers can only dream about.

Numerical Simulation of Particle Stress and Fracture using FEMDEM: Application to Process Catalysts

Supervision:
Dr JP Latham, Dr Jiansheng Xiang
Industry Contacts:
Principal Investigator - Dr Michele Marigo
Co-investigators - Dr Mikael Carlsson, Prof Hugh Stitt

Applications are invited for a PhD studentship to join AMCG (Applied Modelling and Computational Group) in the Department of Earth Science & Engineering.

MARIE CURIE FELLOWSHIP - Early Stage Researcher

Are you a recent graduate in civil, mechanical or chemical engineering, physics
or applied mathematics, with experience in one or more of the following: solid
or soil/granular mechanics, discrete element method (DEM), bulk solids handling,
computational multiphase flow modelling?
Looking to develop a career in cutting-edge engineering with the opportunity to
live and work internationally?
The PARDEM project has brought together industrial and academic partners to
develop the DEM modelling techniques and to predict the behaviour of granular
solids such as pellets, grains, sand and biomass for industrial applications.
As part of PARDEM, the University of Edinburgh has outstanding doctoral training
opportunities in the area of granular solids. We are seeking an exceptional

WaiChing Sun's picture

Shape of particles in DEM

Many granular materials encountered in engineering practice are of irregular shapes that are not essentially smooth or rounded. However, in DEM, grains are idealized as spheres and ellipsoids and their surface are assumed to be sufficiently smooth. As a result, I wonder why there is no model of  irregular shapes and what is the difficulty on implementing such a model? Is there any recent work aimed to simulate grains of irregular shape? Thanks a lot. 

the DEM's solutions for static mechanics seem strange

My own DEM(Discrete Element Method) program's solution for static problem seems strange.

I use my program to calculate the displacement of a cantilever under static pressure:

1. it seems my program shows convergence for static problem as the mesh gets denser. As the mesh grows denser(that means the particle becomes smaller), the displacement(of y direction)  of the free tip becomes smaller.

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