http://www.contactmechanics.org/
Delft 22 - 24 October
Chairmen:
Tom Scarpas Delft University of Technology, The Netherlands
Patrick Selvadurai McGill University, Canada
Hi All ,
I found simple VUMAT from Abaqus manual.It is based on
Von Mises plasticity and gives stress components, vonmises stress
and plastic equivalent strain.
I want to include the adaibatic temperature that rises/falls along the deformation in adiabatic
analysis.From a general book, i found that temperature-rise during deformation comprising
plastic strain1 to plastic strain 2 is given by:
Integral of stress between the strain limits,multiplied by a constant.
Science's Editor in Chief and "Friends" Discuss Peer Review and Journal
Impact. (July 4, 2008)
Bruce
Alberts1, Brooks Hanson2
and Katrina L. Kelner3 collaborated to write this
week's Science editorial on peer review. And if for no other reason
than the weekly has one of the highest impact ratings, when Science
speaks science administrators listen.
Experts say China’s wind energy could grow 1667% by 2020
http://www.iconflict.com/detail/Experts-Say-Chinas-Wind-Energy-Could-Gr…
Sulston argues for open medicine
http://news.bbc.co.uk/2/hi/science/nature/7490384.stm
and listen to audio at http://news.bbc.co.uk/1/hi/sci/tech/7490482.stm
|
By Matt McGrath BBC science correspondent |
As our body, we birth, grow up and dead? Wil the dislocation souce be the same process, if it’s so, what’s the detail process.
(1):the birth of dislocation source
There are many dislocation multiplication mechanism, such Frank-Read source, cross-slip mechanism, L-source. So the questions is that when will these mechanism become active, will the stress be the only criterion? IF so ,what determine the critical stress? Will this critical stress change with the deformation, how is this change?
(2):the evolution of dislocation source
I started my research on citation system with a very positve attitude about that. I have read many of scientometrics papers, but now I am completely disappoined! In the report by the International Mathematical Union (IMU) (attached) about citation statistics. I found an interesting sentence! Citation should not be used for evaluation of different papers in two different disciplines. How about different papers from two different sub-disciplines? and even two different sub-sub-disciplines? and so on!
Hi
I’m trying to develop a VUMat routine so I’ve already
started to learn its features. I recently got this problem that what exactly
the variable stepTime means! I created a model with 3 steps including the initial
step and I coded my routine somehow that when the stepTime is equal to 0 it
prints something into a file. Surprisingly only once in whole analysis the
stepTime would be 0 and that’s exactly at the beginning of the analysis when
totalTime is in fact 0. Could anyone please explain why this happens?
Thanks
