xfem

Dear colleagues,



Apologies for cross postings.



The second ECCOMAS Thematic Conference on the eXtended Finite Element

Method (XFEM) will take place in Cardiff (Cardiff University) in the

period 29 June - 1 July 2011. [see http://www.xfem2011.com for

details]



We would like to invite you and your students to submit original

research contributions in the area of partition of unity enrichment.

A PhD position is available at Centre Henri Tudor (Luxembourg) and Cardiff University (UK) on the simulation of crack propagation with adaptive extended finite element methods.

Candidates from any country are eligible. 

Please contact me for details.

Stephane

A fully funded PhD position is immediately available in the area of multi-scale modeling of geomaterials within the research project "Failure of cohesive geomaterials: bridging the scales - GEOBRIDGE" at Laboratoire Sols, Solides, Structures - Risques (3S-R), Université Joseph Fourier, Grenoble, France.

A fully funded PhD position is available in the area of multi-scale modeling of geomaterials within the research project Failure of cohesive geomaterials: bridging the scales - GEOBRIDGE at Laboratoire Sols, Solides, Structures – Risques (3S-R), Université Joseph Fourier, Grenoble, France. 

Hi all,

 I´m traying to simulate a low-cycle fatigue crack growth in Abaqus 6.9 using xfem. My problem is to add the low cycle method to the xfem solution. 

I believe that the only current option for this would be to manually
create the loading curve and to do the analysis by a brute force
method but i may not be correct in this assumption however.

Please could someone explain a brief method.

i appreciate in advance.

I think a non-zero entry in the stiffness matrix doesn't necessarily imply dependence of ith DOF on the jth DOF. This is the case also for standard FEM (without any enrichments). For example for a quadrilateral 2D element the x component of displacement has interaction with y component at each node, but as we know, two independent values of translation in x and y directions can

There is a basic problem in NATURE of approximation of discontinuity in element using XFEM.I tried to illustrate that below:

for example, If you consider an element with strong discontinuity( like fracture or contact) which usually we use heaviside function as enrichment function. we expect two parts of element deform independently because of nature of problem.



In equation for approximation of this element we have two main parts. First  is 'regular' or 'standard' part which uses the standard shape functions of element and Second is the enriched part.

A one-year post-doc is available in conjunction with

1) Prof. Asenov, University of Glasgow

2) Dr. Bordas, University of Glasgow/Cardiff

 to study the behaviour of nano-CMOS semi-conductors.

Please write to stephane dot bordas at g ma i l dot com 

 for details with your:

1) CV

2) Three references

3) a statement of why you are qualified and interested in this position

 You should

1) have a strong background in finite element methods