Deadline extended for NT2F12 congress which will be held in Transilvania University of BRASOV.

Brasov is one of the largest and most cherished cities of the country. Surrounded on three sides by mountains, it was a perfect place for a medieval settlement.

The old city, founded by the Teutonic Knights in 1211, is one of the best preserved cities in all of Europe. It was thotoughly restored to the delight of an increasing number of tourist. It is the capital city of Brasov Country, in central Romania, in Transylvania, at the foot of the Carpathian Mountains. Brasov also makes a fabulous base for exploring the surrounding countryside where the air is clean and the people friendly.

This is the preprint of an article that will appear in International Journal of Fracture (IJF)

Title: Numerical simulation of intergranular and transgranular crack propagation in ferroelectric polycrystals

Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona

Abstract:

The Department of Industrial Engineering at the University of Pittsburgh anticipates an opening for a postdoctoral associate starting January 2012. The position’s primary area of research will focus on mechanics of micro-scale deformation processes and characterizing the thermomechanics of deformation at micrometer length-scales. Applicants with a strong background in computational solid mechanics and crystal plasticity will be preferred. 

Interested Applicants are requested to Email their CV to:  ravishm [at] pitt [dot] edu 

Dear Colleague,

I have uploaded a video which shows the simulation of Slow-Fast crack propagation in ferroelectric single crystals:

http://www.youtube.com/watch?v=6E7WSVOVAWM

For technical details, please refer to our recently published paper in Acta Materialia:

http://www.sciencedirect.com/science/article/pii/S1359645411001777

Best regards,

Amir Abdollahi

Pressurized elastic capsules arise at scales ranging from the 10 m diameter pressure vessels used to store propane at oil refineries to the microscopic polymeric capsules that may be used in drug delivery. Nature also makes extensive use of pressurized elastic capsules: plant cells, bacteria and fungi have stiff walls, which are subject to an internal turgor pressure. Here, we present theoretical, numerical and experimental investigations of the indentation of a linearly elastic shell subject to a constant internal pressure. We show that, unlike unpressurized shells, the relationship between force and displacement demonstrates two linear regimes.

This is the preprint of an article that will appear in Modelling and Simulation in Materials Science and Engineering (MSMSE)

Title: Phase-field simulation of anisotropic crack propagation in ferroelectric single crystals: effect of microstructure on the fracture process

Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona

Abstract:

Can you define FEM in one line?

If yes, what would it be? And, in that case, permit me a second question: How?

...Really interested in knowing what the members of this community think (of this matter), if they do...

--Ajit

[E&OE]

In the context of an ERA-NET MATERA+ project, the Aerospace and Mechanical Engineering Department is opening a post-doctoral position. in multiscale fracture analysis for composite 

The project

The strategic objective of the project is to help design and stress engineers assess the structural integrity and the damage tolerance of lightweight composite structures through provision of new accurate and predictive multi-scale failure models combined with original and computationally efficient novel numerical methods.

Partners

For those of you looking for FSI simulation on Abaqus platform, recently Simulia has announced the new features in release 6.10, which introduces the capability for performing Computational Fluid Dynamics (CFD) simulation.
So it enables users to perform coupled physics simulations with
Abaqus/Standard and Abaqus/Explicit, such as fluid-structure
interaction between human tissue, a medical device, and fluid flow, more information:

http://www.simulia.com/news/pr_100524_DSS.html

As we all know, finite element matrices are sparse and many memory can be saved if their sparsity is exploited. Due to the latter, we are often provoked to declare the nxn stiffness matrix as a sparse one just before the element loop. Be careful of this method since the larger the matrix the slower the assembly operations. There is a better and more efficient way to code the assembly procedure in Matlab. I will show how to accomplish this.

"The Newton International Fellowship scheme will select the very best early stage post-doctoral researchers from all over the world, and offer support for two years at UK research institutions."

http://www.newtonfellowships.org

If you are interested in applying for a Newton Fellowship at the University of Manchester, meet the criteria specified on the url above, and have a background in:

• Engineering (required)
• X-Ray tomographic imaging (required)
• Finite element analysis (desired)

Please contact me directly and send a brief curriculum vitae.

A postdoctoral position is avilable in the Composite and Heterogeneous Materials Modeling and Simulation (COHMAS) Laboratory at King Abdullah University of Science and Technology (KAUST). The successful candidate will be engaged in modeling and simulation of degradation in composite materials.

An electronic device integrates diverse materials, and inevitably contains sharp features, such as interfaces and corners. When the device is subject to thermal and mechanical loads, the corners develop intense stress and are vulnerable sites to initiate failure. This paper analyzes stress fields at corners in flip-chip packages. The stress at a corner is a linear superposition of two modes of singular fields, with one mode being more singular than the other. The amplitudes of the two modes are represented by two stress intensity factors of dissimilar dimensions. To determine the stress intensity factors, we analyze the flip-chip structures under two loading conditions: stretching of the substrate and bending of the substrate.

I am doing research on the stresses that are produced when a retainer (a thermoplastic sheet) is placed on the teeth. We've designed the project so that we take an initial scan of the sheet and a final "shifted" scan of the sheet. We'd like to compare, find the strain, and calculate the stress neccessary to produce this strain.

I was hoping to use FEA for this...is it possible? I have access to Abaqus and Ansys, and where can i find the commands that allow me to do this.

I am mahantesh, i am doing Mtech in design engg.  please tell me which books or articles i have to reffer so that i get good and depth knowledg of Finite element method.

I am looking for specific research topics in applications of FEM in geotechnical engineering. It is just to gather some topics so as to pick the interesting one for my PHD.Anybody willing to share something on this? You can suggest any topic and of course few details will be helpful.

Open Source Finite element packages

For more Information:

HTTP://WEBLOG11.GOOGLEPAGES.COM 

I am writing to ask about the state of the art in finite element simulation using nonlinear elasticity and explicit dynamics.

Consider, for instance, a 3-d simulation of a hyperelastic beam that's fixed on one end, then  twisted about its long axis by 360 degrees and released. If we apply no friction or viscosity, the sum of kinetic plus potential energy should remain constant as the material springs back and oscillates.

Which FEM codes do the best at conserving KE+PE for a simulation of this type?  If you drop the time step, can you get energy conservation to many significant figures, as one can with, for instance, molecular dynamics simulation? 

I'm curious because I've recently written my own 3-d nonlinear explicit dynamics code that provides very high precision energy conservation, and I'm wondering if it's any better or worse than the nonlinear explicit dynamics codes already available.