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Arc length method - Implementation Issues

Submitted by nizanth on

Hi all,

     i am doing a material nonlinear problem.  I have used NR , which is giving good results till near 'limit point' and after that its giving peaks and troughs.  From the literature  I got to know that I should use arc length method (ALM) instead of NR for strain softening problems.  I am using MATLAB

1) Is there any existing code module for Arc length method which can be directly incorporated in my FE code?  In MATLAB central there is a code but its usable only when we have the analytical expressions.

Problem relating to Contact Pressure in ABAQUS Subroutine

Submitted by rmbwang on
research

I have already obtained the contact pressure (CPRESS) in the ABAQUS model.

NOW, I want to introduce a subroutine in ABAQUS which enables setting the contact pressure as input information, since contact pressue is the intial condition for another model which will incorporate with the existing model. I wonder if anyone can provide some suggestions on which subroutine can read the CPRESS (CSTRESS) as input information.

Many thanks!

EPSRC PhD Studentship at Queen Mary University of London: Thermo-chemo-mechanical modelling of elastomers under extreme conditions

Submitted by Ettore Barbieri on
job
PhD Scholarship
computational mechanics

Dear iMechanicians, 

I have a PhD Studentship available for UK settled status residents.

Settled status in the UK, meaning they have no restrictions on how long they can stay and been 'ordinarily resident' in the UK for 3 years prior to the start of the grant. This means they must have been normally residing in the UK (apart from temporary or occasional absences) and not been residing in the UK wholly or mainly for the purpose of full-time education. (This does not apply to UK or EU nationals).

Two PhD positions in computational mechanics at the University of Tennessee

Submitted by Timothy Truster on
job
Crystal plasticity
Computational Fracture Mechanics

Two PhD positions are currently available in the Computational Laboratory for the Mechanics of Interfaces at the University of Tennessee - Knoxville (http://clmi.utk.edu). Research topics are in the following areas:

 

1. Modeling of aluminum alloys using dislocation density based crystal plasticity methods.

2. Fracture in composite materials using a Discontinuous Galerkin method for debonding

 

Periodic boundary condition on non-rectangular RVE

Submitted by afallah on

Dear friends,
Hi. I'm working on multiscale modeling of soft tissues. For micromechanical modeling of the tissue i consider an RVE with sinusoidal edges as figure 1. 

I imposed periodic boundary conditions on the RVE using corner nodes as master nodes and define the displacement of the other nodes on the boundary related to these master nodes displacements using constraint equations as figure 2.

 

Post-doctoral position at Polytechnique Montréal in the simulation of the shot peening process

Submitted by martin.levesque on
job

Dear All

I am currently looking for post-doctoral candidates to work on the simulation of the shot peening process by coupling discrete and dynamic finite element simulations. This is a two-year position. The project is in collaboration with 4 major aerospace companies and involved 6 other PhDs and 2 PDFs. 

The applicants should have a very strong background in computational mechanics.

Please send me:

Cephalopod-inspired Design of Electro-mechano-chemically Responsive Elastomers for On-demand Fluorescent Patterning

Submitted by Qiming Wang on
research
SAMs Lab research
Mechanochemistry
dielectric elastomer
wrinkling instability
stimuli-responsive polymer
flexible display

Cephalopod-inspired Design of Electro-mechano-chemically Responsive Elastomers for On-demand Fluorescent Patterning

Qiming Wang, Gregory R. Gossweiler, Stephen L. Craig*, Xuanhe Zhao*

Pseudomagnetic Fields in a Locally Strained Graphene Drumhead

Submitted by Shuze Zhu on
research
strain engineering
graphene
pseudofield
zero-field quantum hall effect
Teng Li Group Research

Recent experiments reveal that a scanning tunneling microscopy (STM) probe tip can generate a highly localized strain field in a graphene drumhead, which in turn leads to pseudomagnetic fields in the graphene that can spatially confine graphene charge carriers in a way similar to a lithographically defined quantum dot (QD). While these experimental findings are intriguing, their further implementation in nanoelectronic devices hinges upon the knowledge of key underpinning parameters, which still remain elusive.

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