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Beam Problem

Submitted by shaikster on Wed, 07/22/2009 - 14:43

Forums

Hello all,

I am trying to obtain the normal stresses in a beam subjected to a bending moment. The ratio of the length to thickness of the beam is approximately 3. 8. Will Euller-Bernoulli beam theory provide reasonable results for the normal stresses (using flexural formula)? Is there a formula similar to the flexural formula that considers the effect of transverse shear (timoshenko theory), to compute the normal stresses?

I would appreciate any insights on this problem.

Best Regards,

Shaik

NIST MSEL Postdoc Recruitment Video

Submitted by dsatcher on Wed, 07/22/2009 - 13:44

Phisical significance of ENTROPY

Submitted by mahesh mane on Wed, 07/22/2009 - 13:37

I got that there exist a property called ENTROPY;for which the difference in it's values at two states is (Q/T).but I can't get it's physical significance

I know that it represents the irreversibility of the process.But it doesn't sutisfy me.So if anyone can...

Non-linear energy release rate (JI,JII,JIII)

Submitted by Joachim Guilie on Wed, 07/22/2009 - 13:36

fracture mechanics

crack

Hi all,

I am currently working on mooney-rivlin materials. I wonder if someone have tried to compute GI, GII and GIII with the EDI because I don't understand how to compute WIII with mooney-rivlin.

Thanks a lot

Joachim Guilie

Thermo-mechanical model of friction stir welding

Submitted by Aurelio on Wed, 07/22/2009 - 09:48

Plasticity

CFD

welding

My name is Aurelio Tronci and I am a PhD student at the University of Cagliari (Italy). My research topics are related to friction stir welding (FSW). The work done so far has focused on the application of the DOE technique in order to investigate the influence of welding parameters on the microstructural and mechanical properties of aluminum alloys (AA 2198 T3-T8) joints. At the moment I am interested in the development of a thermo-mechanical model of FSW with CFD, but I find it really difficult to find material constants (Sellars and Tegart law) for all the alloys I have to test.

Post-Doc Positions in Computational Materials / Computational Chemistry at The University of Texas at Arlington

Submitted by pkroll on Tue, 07/21/2009 - 20:01

job

high-performance computing

multi-scale modeling and simulation

large scale molecular dynamics

materials and structures

We are seeking two post-doctoral researchers to pursue computational studies of polymer-derived high-temperature ceramics, which exhibit an unusual structure at the nano-scale. Projects involve quantum and classical molecular dynamics simulations, modeling structure formation and fracture mechanics, solid state and gas-solid thermodynamic processes, and oxidation behavior.

How Should Journal Club Work at iMechanica?

Submitted by John E. Dolbow on Tue, 07/21/2009 - 17:36

research

Online Journal Club

This has been a topic that the editors of Journal Club have been discussing for some time now. We would like some feedback from the entire iMechanica community.

Variational principles for uncertainty quantification of random heterogeneous materials

Submitted by Frankxu on Tue, 07/21/2009 - 16:18

research

The article can be downloaded from http://personal.stevens.edu/~xxu1/authorProof-07-10-1234.pdf

Ph.D. position in material modelling

Submitted by cbrandl on Tue, 07/21/2009 - 09:15

job

dislocation nucleation; nanograin; nanophenomena; molecular dynamics;

Please see attached pdf for detailed information.

The group Material Science and Simulations (Helena Van Swygenhoven) is looking for a PhD candiate perfoming atomistic simulations on dislocation/interface interaction. The group performs research in the structural and mechanical properties of metal, alloys and composites using in-situ testing facility and is exploiding synergies with computational material science.