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zichen's picture

Shape formation of helical ribbons induced by material anisotropy

Helices are ubiquitous building blocks in natural and engineered systems. Previous studies showed that helical ribbon morphology can result from anisotropic driving forces and geometric misorientation between the principal axes of the driving forces and the geometric axes. However, helical ribbon shapes induced by elastic modulus anisotropy have not been systematically examined even though most natural and engineered structures are made of composite materials with anisotropic mechanical properties.

Regarding Node based Submodeling

Hello Everyone,

 

I am trying to understand how does node based submodeling work in abaqus? I am not able to comprehend how to transfer nodal outputs from some other FEM package so as to perform submodeling in Abaqus? Any help in this regard is highly appreciated.

Masters/Ph.D position available

 On behalf

 A fully funded Masters or Ph.D student position is available @ Monash University, Malaysia Campus. The project will be supervised by Dr.Ean Hin OOI (http://scholar.google.com.sg/citations?user=SAj61qwAAAAJ&hl=en ). Kindly email your enquiries to Ooi.Ean.Hin@monash.edu

Is anyone familiar with deriving shape functions for different beam end conditions?

I am doing my research in nonlinear vibration of beams. In that research, I have to derive the shape function for different end conditions of the beam. Regarding this,I need some ideas. Are there books I can reference?

Thank you for your help.

Jinxiong Zhou's picture

Modeling programmable deformation of self-folding all-polymer structures with temperature-sensitive hydrogels

Combining
soft active hydrogels with hard passive polymers gives rise to all-polymer
composites. The hydrogel is sensitive to external stimuli while the passive
polymer is inert. Utilizing the different behaviors of two materials subject to
environmental variation, for example temperature, results in self-folding soft
machines. We report our efforts to model the programmable deformation of
self-folding structures with temperature-sensitive hydrogels. The self-folding
structures are realized either by constructing a bilayer structure or by
incorporating hydrogels as hinges. The methodology and the results may aid the

Cutting process simulation in Abaqus

Hello ,

 I am working on a project using abaqus to
simulate miling process. As the first stage, I have to be able to simulate cutting process in Abaqus. I have looked up Abacus 6.11 documentaion a lot but did not find too much of usefull information. Could any one kindly give some hints how to develop such model or introduce me some usefull complete resources?

Regards,

Reza

mac's picture

Summer School on Advances in Finite Element Methods

The Summer School on Advances in Finite Element Methods will be held in Cape Town, South Africa, from 14-18 Jan 2013.
The website www.fesummerschool.co.za contains details such as registration, accommodation, lecturers and the schedule. 

The objective of this summer school is first, to provide the necessary background in the mathematics of finite elements, and second, to build on this background by addressing the topics of adaptivity and discontinuous Galerkin methods.

Amir Abdollahi's picture

Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials

This is an accepted manuscript in Journal of the Mechanics and Physics of Solids

Title: Phase-field modeling of crack propagation in piezoelectric and ferroelectric materials with different electromechanical crack conditions

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

 

Abstract:

Amir Abdollahi's picture

Crack initiation patterns at electrode edges in multilayer ferroelectric actuators

This is the preprint of an article that will appear in Smart Materials and Structures (SMS)

Title: Crack initiation patterns at electrode edges in multilayer ferroelectric actuators

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

 

Abstract:

Postdoc position

The Department of
Industrial Engineering at the University of Pittsburgh anticipates an opening
for a postdoctoral associate starting September 2012. The position’s primary
area of research will focus on mechanics of the microforming processes and
characterizing the thermomechanics of deformation at small length-scales. The
initial appointment is for one year with potential to extend, subject to the
availability of funds. A strong background in solid mechanics with an expertise

Catalin I. Pruncu's picture

Deadline extended for NT2F12 congress

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.

Amir Abdollahi's picture

Numerical simulation of intergranular and transgranular crack propagation in ferroelectric polycrystals

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:

Postdoctoral Position in Solid Mechanics

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. 

Amir Abdollahi's picture

Slow-Fast Crack Propagation in Ferroelectric Single Crystals

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

Amin Ajdari's picture

The indentation of pressurized elastic shells: from polymeric capsules to yeast cells - D.Vella, A.Ajdari, A.Vaziri & A.Boudaoud

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.

Amir Abdollahi's picture

Phase-field simulation of anisotropic crack propagation in ferroelectric single crystals

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:

Open House: Can you define FEM in one line?

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]

 

SIMULIA announces new features in Abaqus 6.10

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

 

Newton International Fellowships

"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:

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