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:

1) Whether strains are constant (like 3-noded CST) or vary (like 6-noded LST) within the element ? Some of the literature seems to refer to constant strain (from translational dofs) & higher order strain (from rot'n nodes) being superimposed. 

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

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 Effects” and is initially limited to 1 year.

Hi,

I would like to model a microstructure using Abaqus. My question is how to deal with the grain boundaries ? Should I use cohesive elements ? Any ideas on modeling grain boundaries using FEM will be very helpfull.

Thanks,

Ayoub

Hello,

Recently I faced few questions in a course that I am attending:

1) Outline the salient features of different higher order shell theories.

2)Explain why some shell theories are not suitable as the basis of element formulation.

3) Discuss any limitations of elements being used in relation to their underlying formulation ( e.g use of shallow shell theory or cylindrical shell theory).

Hello,

Recently I faced two questions in course that I am attending:

1) Outline the salient features of different higher order shell theories.

2)Explain why some shell theories are not suitable as the basis of element formulation.

3) Discuss any limitations of elements being used in relation to their underlying formulation ( e.g use of shallow shell theory or cylindrical shell theory).

A postdoctoral fellowship is available in the Duke Computational Mechanics Laboratory, beginning in September of 2009 (with flexibility on timing).  Funding for the fellowship concerns research in the simulation of large-scale fragmentation phenomena.  The ideal candidate will have experience in some combination of the following areas:

There are a lot of coures on finite element methods and many that touch upon aspects of finite element error analysis.  One thing, however, that is hard to learn in a consice form are the essential aspects of a priori error analysis.  These involve a decent knowledge of variational properties of BVPs and a good understanding of interpolation theory.  In a very very modest attempt to help some students in my undergraduate FEA course I prepared some notes to introduce them to some of the more mathematical aspects of FEA analysis.  They are strictly one dimensional and linear to help with the understanding.

Hello,

Via Jeff Weiss :

Professor Jose E. Andrade from Northwestern University is the
recipient of the 2006 Zienkiewicz medal awarded biennially by the
Institution of Civil Engineers from London. The award goes to Andrade
for his contribution entitled ' Capturing strain localization in dense
sands with random density' in IJNME 2006; 67:1531-1564 DOI:
10.1002/nme.1673 (link: http://www3.interscience.wiley.com/cgi-bin/fulltext/112519037/PDFSTART)

Our sincerest congratulations to Prof. Andrade!