iMechanica

We welcome applications for an Ellen William Distinguished Postdoctoral Fellowship at the University of Maryland, College Park, MD, USA.

Article citation: Miguel Piñeirua, Soft Matter, 2010, DOI: 10.1039/c0sm00004c

Capillary origami controlled by an electric field

Miguel Piñeirua, José Bico and Benoît Roman

Following our recent article on this new method, we are making our Matlab routines available. The package contains standard DIC, SSDIC, plus a few extras. More info here

“Subset Splitting Digital Image Correlation” (SSDIC) is based on DIC, but in addition SSDIC can capture displacement discontinuities near shear bands or cracks, where standard DIC fails.

RA position (MS in Engineering System)

A RA position is available in the Department of Engineering Technology, University of North Texas-Denton in the fields of experimental
characterization of piezoelectric material, theoretical analysis and finite element modeling of piezoelectric devices such as energy harvesters,
resonators and sensors. The position will start from Fall, 2010.

Qualifications

Atomistic simulations show that organosilicates, used as low-permittivity dielectric materials in advanced integrated circuits, can be made substantially stiffer than amorphous silica, while maintaining a lower mass density. The enhanced stiffness is achieved by incorporating organic cross-links to replace bridging oxygen atoms in the silica network. To elucidate the mechanism responsible for the enhanced stiffness, the conformational changes in the network upon hydrostatic and shear loading are examined.

We are looking for suitable candidates for a PhD research work in Computational Mechanics and numerical simulation, to be carried out at the Department of Mechanical Engineering, University of Aveiro, Portugal, in one of the following areas:

- development of new finite elements for metal forming applications;

- numerical simulation of metal forming (sheet and bulk forming);

- tubular hydroforming numerical simulation;

- structural stability and buckling analysis of reinforced aircraft panels;

ICoBT 2011 is a new conference which will be held at Imperial College London from 18-21 September 2011. Contributions are welcomed from scientists, engineers and clinicians working in the fields of orthopaedic surgery, dentistry, biomechanics, biomaterials, cosmetic chemistry, biophysics and biomimetics. Abstract submissions are now open!

I am trying to simulate the long term behaviour of the PBT (polybutyelene terephtalate) thermoplastic.

Dear Collegues,

On behalf of the International Scientific Committee, I am pleased to inform you of the 3rd International Conference on IMPACT LOADING OF LIGHTWEIGHT STRUCTURES (ILLS 2011) taking place in  Valenciennes, France, June 28th-July 1st, 2011: http://ills2011.org

Hi All,

 I want to model post-tensioning tendons embedded with concrete structure. Both ends of tendons are anchored. Can anyone inform me what kind of element most suitable to model the tendons and concrete structure in ABAQUS? I tried solid part for both items, yet as the tendon diameter is very small if compared to the concrete dimension, the resulting number of mesh on the concrete structure is very large.

I am working on thermal buckling of annular FGM plates using the DQ method in FORTRAN. The results show that for simply-simply edges, the nonlinear thermal buckling loads are greater than those of eigen buckling loads. But for clamped-clamped edges, as it may be expected, the nonlinear buckling loads are under estimate, i.e. they are lower than eigen buckling loads.Why?

Is it possible that the nonlinear buckling analysis gives us an over estimate load ?

Hello everyone

Can anyone suggest me how much computational power needed to run a 3D model with ALE mesh in Abaqus/Explicit. I currently use (intel core i7 3.2 GHz and 12 GB RAM) but it seems not sufficient and abaqus abort itself after some running time. I would be very gratefull if you suggest any valuable information. by the way, I am working on cutting simulation in abaqus/explict.

Regards

From: Bar-Cohen, Yoseph (355N) <yoseph.bar-cohen@jpl.nasa.gov>

Dear Colleague,

I am very pleased to inform you that the 23rd issue of the WW-EAP Newsletter is now available at: 

I now have several openings for Masters and PhDs for the following projects:

1) Biomimetic study of the structure, mechanics and design of fish scales (funding: NSF). Involves atomic force and scanning electron microscopy, mechanics of composites and fracture, small scale and in-situ testing, multiscale modeling.

Usually, the position of points in Mohr's circle is attributed to a sign convetion related to shear stresses. It is shown that points in the circle related to shear stresses generating a clockwise moment are in the upper half of the circle as a consequence of the position of principal directions, not due to a convention. I hope this note could help to explain better the use of Mohr's circle in plane stress states.

Dear all,

 On Thursday 28th and Friday 29th of October 2010, we will organise a course on using the CONTACT software at Delft University of Technology in the Netherlands.

The aims of the course are:

 Data Storage Institute in Singapore (www.dsi.a-star.edu.sg) has an immediate opening for a Post Doctoral Fellow in Tribology of Magnetic Data Storage System. The PDF will be involved in the research and development of advanced overcoats and lubricants for future magnetic data storage systems. A PhD degree in Mechanical/Chemical Engineering, Materials Science & Engineering, Physics/Chemistry is essential for this position. Good testing skills and strong research experience are desirable.

Hi all ... Is there a way to find/calibrate material parameters for johnson and cook material model using experimental data in Abaqus? .. As far as i know abaqus has something called as data editor with which Hyperelastic materials models can be calibrated with experimental results. If not is there any other way arround to do calibration of material parameter with abaqus.

hi all,

How to decide the geometric nonlinearity?.

i.e If i consider a sturcutre for example-fishing rod or wind turbine blade, how to decide that the structure is geometrically nonlinear.

Does it requires lots of calculations or by experimentation... For example by just observing the structure, is it possible to decide?

What are the reasons to consider the geometric nonliearities.

Regards

sagar