The Computational Science and Engineering Program of the University of Illinois at Urbana-Champaign is seeking highly qualified candidates for two research programmer positions. The positions are in the general area of Computational Solid Mechanics. Successful candidates will develop and implement parallel computational tools. Candidates should be able to interact with faculty and students from a wide variety of UI engineering and science departments, and be prepared to work closely with U.S. government and industry researchers.
1. M.S. or Ph.D. in Computer Science, Mechanical Engineering, Theoretical and Applied Mechanics, Applied Mathematics, Physics or related engineering or science discipline
Time for registration for "Interface Design of Polymer Matrix Composites - Mechanics, Chemistry, Modelling and Manufacturing"Submitted by Bent F. Sørensen on Thu, 2007-08-16 07:26.
The programme for the 28th Risø International Symposium on Materials Science has now been finalized (see http://www.risoe.dk/Conferences/symp28/programme.aspx ).
The Symposium is held at Risø National Laboratory, The Technical University of Denmark, 3-6 September 2007.
To sign up for the conference, please register up via the Symposium homepage: http://risoe-forms.risoe.dk/RISMS/RISMS_registration.asp
An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
For every action, there is an equal and opposite reaction.
Dusan Krajcinovic, retired professor of mechanical and aerospace engineering at Arizona State University, passed away on August 10, 2007, after a long illness. Dusan was active in the mechanics community. In addition to his teaching and research activities, he was a past member and chair of the Applied Mechanics Divison of ASME. He also served a term on the U. S. National Committee on Theoretical and Applied Mechanics. He authored the book Damage Mechanics published by North-Holland in 1996. He will be missed by all those who knew him.
In July 2007, my friend of a consulting company contacted me for recruiting a computational mechanics engineer. I told him that all my graduate students found jobs, and there are not many mechanics students in our small department. So, I posted his ad at iMechanica. Only after one week, he asked me to withdraw this ad! Why?
Because many high-qualified applicants contacted him in one week and, he’d give the offer right away. I believe this example is an index of active user groups of iMechanica.
Thank you for your interest shown in my previously posted work. Here's a post-print for an article of an extension to my previous work. Extension in the sense that the MD simulation was performed on "larger" metallic nanowires (2.0 nm to 6.0 nm), and the behavior of gold (Au) nanowires were studied. The mechanism behind strain-induced amorphization was explained and the phenomenon of multiple necking was observed, implying the presence of "localized" amorphization instead of a "globalized" one observed in shorter nanowires.
Huang, Nano Lett. 7, 2335 (2007); Philip Ball, Nature 448, 396 (2007)
Watch movies at: http://pubs3.acs.org/acs/journals/supporting_information.page?in_manuscr...
See attachment for announcement of a Structural FEA Engineer position at Schlumberger's Sugar Land Product Center
in Sugar Land, Texas. If interested, please respond to Sepand Ossia (email@example.com).
A cohesive law for carbon nanotube/polymer interfaces based on the van der Waals force (JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 54 (11): 2436-2452 NOV 2006)
Authors: Jiang, L.Y., Huang, Y., Jiang, H., Ravichandran, G., Gao, H., Hwang, K.C. and Liu, B.
We have established the cohesive law for interfaces between a carbon nanotube (CNT) and polymer that are not well bonded and are characterized by the van der Waals force. The tensile cohesive strength and cohesive energy are given in terms of the area density of carbon nanotube and volume density of polymer, as well as the parameters in the van der Waals force.
Our paper on the Mechanical threshold stress (MTS) model for 6061-T6 aluminum has been accepted by JoMMS. There are several things of interest in the paper:
1) The use of a phonon drag model to predict the sharp increase in flow stress at strain rates above 10,000 /s. This behavior is seen in a number of materials and is hard to fit using standard power law plasticity models. Our model does a good job in this regard.
2) The sharp drop in flow stress at high temperatures. A slight modification to the MTS model allows us to do better than previous versions of the model. But there is still some way to go.
Hello every body,
As most of you know, fracture mechanics of polymer materials needs a special consideration of the viscoelastic material properties. Especially under thermomechanical loading the role of glass transition temperature T_g is very important. That is why people try to characterize the material with different methods including stress relaxation based on Time-Temperature superposition or DMA test.
a similar problem regarding the fracture mechanics of polymers appear when the material is under moisture loading. For example in Electronics Packaging the mold compound of the IC packages absorbs moisture and moisture decreases the interfacial strength between the Mold compound and leadframe.
To: Engineers, Fracture Analysts, Mechanicians, Physicists...
In science and engineering, we have an excellent tradition: naming a physical unit using the name of a prominent personality from the concerned field. For example, in SI system, we measure force in newton, work in joule, power in watt...
But the unit of fracture toughness, i.e. KIC, is too lengthy to pronounce: (mega) pascal-underoot-meter. Further, it has also been in use for something like half a century by now, perhaps more. So, how do you like the idea of giving a name to this unit?
As far as I can see, the possible choices are:
- G. M. Whitesides, Writing a paper. Advanced Materials 15, 1375-1377, 2004. This three-page essay by a prolific professor at Harvard advocates a process: start writing a paper at the same time you start a research project. Every thinking person should read this essay, and give the process a try.
- David Weitz, Weitzlab Guide to Good Paper Writing. David Weitz, of Harvard University, leads a large and prolific experimental soft condensed matter group.
Jan D. Achenbach, Walter P. Murphy Professor and McCormick School Distinguished Professor at Northwestern University was presented a 2005 National Medal of Science by President George W. Bush on July 27. Achenbach, who is well known in the mechanics community, was honored for his seminal contributions to engineering research and education in the area of wave propagation in solids and for pioneering the field of quantitative non-destructive evaluation. Previously, Achenbach received a 2003 National medal of Technology from President Bush.
Since I am an alum of the University of Minnesota, when I was a PhD student I lived only a few blocks from the site of yesterday's catastrophic bridge collapse in Minneapolis. The statics analysis of a truss is almost the first thing learned by every undergraduate engineering student, and appears to be relevant here. It is interesting to see words like "fatigue crack" and "vibrations" in the news . In light of such events, never has there been a better time to step forward and emphasize the importance of mechanics in daily life! Each time we drive across a bridge we are relying
House Passes $600 Million Increase in National Science Foundation Budget July 27, 2007 --The U.S. House of Representatives passed an appropriations bill that would increase funding for the National Science Foundation (NSF) by nearly $600 million or 10 percent to $6.5 billion in fiscal year 2008. The bill would put NSF on track to double its budget in less than 10 years.
Cambridge University Press and the Journal of Fluid Mechanics are delighted to announce the launch of The Batchelor Prize, sponsored by the Journal of Fluid Mechanics, to be awarded in recognition of outstanding research in fluid mechanics.
The Batchelor Prize is an award initially of US$25,000 to be presented at the International Congress of Theoretical and Applied Mathematics (ICTAM), taking place in Adelaide in August 2008. The recipient of the prize will deliver a lecture at ICTAM and this will also be published in Journal of Fluid Mechanics and be made freely available on the Cambridge Journals website.
Further details and instructions for making nominations are contained in the attached file. The deadline for nominations is 30 September 2007.
Attached is a post-print of one of my journal papers submitted in 2005. A brief description of my paper is as follows:
ASSOCIATE or ASSISTANT PROFESSOR
EXPERIMENTAL MECHANICS OF MATERIALS
The Department of Mechanical Engineering at the University of Wyoming invites applications for a tenure-track faculty position. Applicants are sought at the Associate or Assistant Professor level with expertise in experimental solid mechanics. Areas include but are not limited to the study of heterogeneous material systems, biomaterials, nanomaterials, thin films, fracture, fatigue and damage.
Within the last two weeks the US National Science Foundation (NSF) published not one but two studies on (a) the attitudes of scientists and engineers to the changing world of publication, and (b) the relative global productibity of US science & engineering as measured by journal publication.
These are not dense 500 page reports, but short, readable (10-15 min.). I think iMechanica readers will find them relevant and interesting:
I've been to two conferences this year and I've again seen the same annoying features in many talks that have been warned against by numerous people over the years.
Here are some tips that might come in handy :