research

This paper reports the quantitative measurement of a full spectrum of mechanical properties of fivefold twinned silver (Ag) nanowires (NWs), including Young’s modulus, yield strength, and ultimate tensile strength. In-situ tensile testing of Ag NWs with diameters between 34 and 130 nm was carried out inside a scanning electron microscope (SEM). Young’s modulus, yield strength, and ultimate tensile strength all increased as the NW diameter decreased.

We systematically investigated the interesting electric response of the aligned CNT ribbons under mechanical strain. We found that CNTs slide on a PDMS substrate under tension, but buckle under compression (releasing). Such an irreversible mechanical deformation is responsible for the observed irreversibility in the electric resistance upon the first stretching/releasing.

how to mesh two sucessive volumes with different meshing

i've modeled a column as a volume

i need a closer or finer mesh near the junction of beam

anyone pls guide me on this issue???

Can anyone send me the paper by P A Cundall and RD Hart.Title of paper is NUMERICAL MODELLING OF
DISCONTINUA.It came in Engineering Computations journal paper (1992).I need it for my research work. thank you. rajeshpnair [at] gmail.com

You can see practical model of cam follower mechanism for clean energy.
Follower move little bit and help cam to rotate 6 times more peripheral
length. Cam can rotate 360 degree using two followers. You can get full
research at my blog at

http://energyefficientmechanism.blogspot.in/2009/04/mechanism-to-increa…

Special Issue on Instantaneous Angular Speed (IAS) processing and angular applications

For more information, visit the journal homepage:  http://www.journals.elsevier.com/mechanical-systems-and-signal-processing/

Amit Das         Amit Acharya        Johannes Zimmer          Karsten Matthies

Strength of graphenes containing randomly dispersed vacancies

Once in a while I have to find the stiffness of a spring that I get from the local hardware shop.  I usually use a formula that can be found in some books on mechanics of materials.

But the assumptions bother me a bit because the springs that I used usually underwent large deformations and I wasn't sure whether the numbers I was using were correct or not.  

To check the formula I compared its predicted k to numbers from Abaqus simulations and found reasonably good results for many situations - but not for soft springs.