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finite elements

postdoctoral position - isogeometric analysis

IMATI-CNR and the Mathematics Department of the University of Pavia offer a postdoc position on isogeometric analysis. This research project focuses on the design and implementation of innovative isogeometric methods for solid/fluid mechanics.  In particular the target applications are related to

- nearly-incompressible and fibered materials

- fluids in geological formations

This research project is partially supported by the private sector, and is supervised by Annalisa Buffa and Giancarlo Sangalli.

New shear lock free finite elements with arbitrary higher order derivative

A set of highly efficient and shear lock free finite elements based on Timoshenko  beam and Reissner-Mindlin plate theories has been developed for the analysis of thin and thick structures. These elements have arbitrary higher order derivatives and do not require any spcial integration scheme. All are isoparametric elements.

P.Subramanian

Analysis of beams and plates using shear lock free finite elements based on Timoshenko beam and Mindlin-Reissner plate theories

Simple finite elements based on Timoshenko beam and Mindlin plate theories have been developed for the analysis of thick and thin structures (beams and plates) using standard finite element procedure. These elements have 3 dof and a new concept, Convergence Factor, is introduced in the formuation to accelerate convergence keeping the number of elements constant. No shear correction factor is used and no shear lock problem is encountered.


Subramanian

jsegurado's picture

24th International Workshop on Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain, on October 1st-3rd 2014

The abstract submission for the 24th International Workshop on
Computational Mechanics of Materials (IWCMM 24) in Madrid, Spain, on
October 1st-3rd, 2014 is now opened. The deadline for abstract
submission is June 15th, 2014.

The workshop is intended to cover all aspects of modeling and
simulations of the mechanical behavior at different length and time
scales. The materials of interest range from traditional materials such
as metals, alloys, polymers and composites to advanced and emerging
materials and bio-materials.

Computational Mechanics Engineer

Computational Mechanics Engineer

Third Wave Systems, a leading
provider of CAE analysis software and services for machining manufacturing, is
seeking enthusiastic additions to our computational mechanics software
development team.  This position holds
the primary responsibility of developing and implementing numerical methods,
finite element formulations, smooth particle hydrodynamics (SPH), meshless
methods, adaptive and initial mesh generation, three-dimensional geometry
engines, mechanistic machining models, constitutive models for the simulation
and optimization of metal, composite, and ceramic cutting processes.  The Computational Mechanics Engineer (CME) will

Underlying Material Response for Lüders-Like Instabilities

► The underlying material response of partially unstable materials is measured. ► This is done for Lüders deformed steel and a shape memory alloy. ► They both exhibit an up-down-up response. ► The extracted responses used in numerical models reproduce the structural responses.

Vikram Gavini's picture

Higher-order adaptive finite-element methods for Kohn-Sham density functional theory

Dear Colleagues,

I wish to share with you our recent article on "Higher-order adaptive finite-element method for Kohn-Sham density functional theory", which will soon appear in the Journal of Computational Physics. Below is the abstract and attached is a preprint of the article.

P. Motamarri, N.R. Nowak, K. Leiter, J. Knap, V. Gavini, Higher-order adaptive finite-element methods for Kohn-Sham density functional theory, J. Comp. Phys. 253, 308-343 (2013).

Required - Verification test for Incompressible hyperelastic models

Choose a channel featured in the header of iMechanica: 

Hi,

I am working with a finite element code implemented in C++ in my research group. Recentl I implemneted an incompressible finite strain element.

 Currently I am making use of verification tests to check whether my element runs accurately for various hyperelastic strain-energy models. I have succesfully completed a verification test using the Mooney-rivlin strain-energy density function. However, I have been unable to find verification/benchmark tests which I may use to test other strain-energy density functions.

deal.II finite element library course

Dear fellow researcher in finite elements 

We will be hosting a 3 day course on the state-of-the-art open-source finite element library deal.II . The course will be run by Prof Wolfgang Bangerth from Texas A&M. It will take place in Cape Town, South Africa, from 5-7 August 2013. The course is aimed at postgraduate students and researchers who wish to learn the fundamentals of deal.II for use in their own research.

Finite element software with analytical sensitivity analysis

 

 As structural optimization can be, of course, greatly sped up with the use of analytical sensitivies (analytical gradients) of the e.g. stress with respect to geometrical design variables, I wanted to inquire which FE software has the functionality.  The ones I am aware of: NASTRAN can and ANSYS cannot. How about others?

 Many thanks in advance!

 

 

N. Sukumar's picture

Minisymposium on Electronic-Structure Methods at USNCCM12

Dear Colleagues:

We would like to invite you to submit a contribution to a minisymposium that we are organizing on Emerging Methods for Large-Scale Quantum-Mechanical Materials Calculations at the 12th US National Congress on Computational Mechanics, to be held July 22-25, 2013 in Raleigh, NC. This minisymposium aims to bring together leading researchers in this emerging area to discuss and exchange ideas on new methods developments for density-functional calculations, mathematical analysis, and applications of ab initio methods in electronic-structure calculations.

A review on multiscale methods for material modeling

Dear all,

Please find enclosed our paper which is published on Journal of Multiscale Modelling
Vol. 3, No. 4 (2011) 1–
42 which gives an overview of state of the art multiscale techniques for material modeling. 

The paper discusses the following topics: homogenization, Representative volume element, computational homogenization (Fe2 methods) for both both bulk materials and strong discontinuities. 

I hope the paper is useful for beginners to the field.

All the bests, 

N. Sukumar's picture

Workshop on Generalized Barycentric Coordinates in Geometry Processing and FEM/BEM

================================================================
                                         Call for participation
--------------------------------------------------------------------------------------------------------------
                  Workshop on Barycentric Coordinates in Geometry
                  Processing and Finite/Boundary Element Methods
--------------------------------------------------------------------------------------------------------------
                  July 25-27, 2012, Columbia University, New York

Post-doctoral position at TU Darmstadt, Germany: Numerical methods in Solid Mechanics

A post-doctoral position is available at our continuum mechanics workgroup (Prof. Tsakmakis, TU Darmstadt, Germany) for developing user subroutines and user elements in finite element programs.

Experience in nonlinear finite element analysis, numerical methods in solid mechanics and FORTRAN 90 is needed.

If you are interested, please contact me, Dr. C. Broese,  broese@mechanik.tu-darmstadt.de

(Opening date: June, 1st 2012 - Closing date: June, 30th 2012)

Panagiotis KOTRONIS's picture

Post Doc Position: Risk-based Selection of Constitutive Models for Geotechnical Analysis, EC Nantes (France)

Post Doc description:

Soil, as a typical natural material, has very complex behaviour which is very difficult to be accurately modelled. In geotechnical engineering, about half of the accidents are caused by insufficient designs. The soil’s constitutive model is the fundamental issue for modelling and analyzing soil-related engineering systems.

Francois Barthelat's picture

Post-doctoral position in biological and biomimetic materials at McGill University

I have an open position for a Post-doctoral researcher in the area of the mechanics of biological materials and novel biomimetic materials, starting immediately. The projects involve mechanics of biological and engineered nano and micro-interfaces, mechanics of fish scales, and design, fabrication and testing of composite materials inspired from nacre. The successful candidate will lead 1-2 projects and will be involved in another 2-3 ongoing projects in these areas, in collaboration with graduate students (more below).   

    Finite Element Modelling of Soft Matter

    I'm interested in developing finite element software for soft matter configurations.  Is there any open source FE software already developed for such materials?  My purpose is to research and develop algorithms that use GPU technology for modelling complex materials on a desktop

    Post-doctoral position in multidisciplinary design optimization (ULB-BATir, Belgium)

    Environment

    The post-doctoral position will be accomplished within the BATir (Building, Architecture & Town planning) department of the Brussels School of Engineering/´Ecole polytechnique de Bruxelles, at the Universit´e Libre de Bruxelles (http://batir.ulb.ac.be ). Duration of the position: 18 months, starting in April 2012.

     

    Profile

    First order linear system

    A linear (hyperbolic) first-order system has to be solved using Finite Elements.

    As I understand usually non-standard discretizations are used in this case (Discontinuous Galerkin for example).

    What is the reason for this? Can such an equation be modeled using standard Galerkin methods (say, linear finite elements)? 

    Would standard Galerkin discretization cause instability of the solution?

    Thanks,

    Daniel

    3-Noded Triangle with Drilling Rotations

    I'm trying to better understand the 3-noded triangular element with drilling rotations.

    I think that the 3-noded triangle with drilling rotations is derived from the 6-noded linear strain triangle by, for mid-side nodes, constraining out-of-plane dof & converting in-plane dof to nodal rotation.

    In particular, I'm wondering about the following:

    PhD position : hex mesh generation

    Two PhD studentships opportunities are available at the Universite catholique de
    Louvain in Belgium for outstanding candidates.
    The aim of the project is to develop a novel approach for generating
    dominant hex meshes for general/complex 3D models. The approach will be based
    both a generalisation of Lloyd's algorithm and on the resolution of some kind of
    PDE in the domain in order to compute distances, curvatures, surface
    geodesics... We look here for an indirect approach i.e. we first generate the
    points and then reconnect them. All the developments will be done in the
    framework of gmsh (http://www.geuz.org/gmsh).
    Successfull candidates should have a strong background in applied
    mathematics/numerical methods for CFD. Some knownledge of mesh generation

    Hirschberger's picture

    Position for Research staff member at Leibniz Universität Hannover, Germany

    The Graduate School MUSIC ("Multiscale Methods for Interface Coupling") and the
    Institute of Continuum Mechanics at Leibniz Universität Hannover invites
    applications for a position as a

    Research Staff Member in Computational Mechanics

    (Salary scale E13 TV-L)

    to be appointed on 1 April 2010.

    The position is embedded into the Junior Research Group on „Multiscale Modelling of
    Materials and Interfaces with Size Effec
    ts” and is initially limited to 1 year.

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