Abstract

At iMechanica, almost none talks about topics from structural dynamics and design, theory of machines, automotive mechanics, space mechanics, etc.

Let me help correct this situation by raising two questions below. Well-thought answers from any individual are welcome.

First, some background for the questions.

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.



Qualifications:

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. 

Newton's laws of motion

First

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.

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.

doi:10.1016/j.engfracmech.2007.07.022 

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_manusc…