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CONTACT set up in irregular surface.-analysis in Ansys

Submitted by one on

Hi all, i am the final semester student in.Struc Mecha.For my final
project i have to model combine sheet pile with  FEM. i used ansys for
set up the model. Combination of AZ,HZ n RZ profile were developed
sheet pile. In my modelling i applied frictional contact to define all
the connection between two parts. When i run my calculation, it does
not converged when body get  contact. I was applied spring and small
load step in set up.but still does not work too..if anybody have any

How to prevent the trash ADs at iMechanica?

Submitted by Ying Li on

Recently, more and more trash ADs appear at imechanica. The users like "ORDER CIALIS ONLINE - US DRUGSTORE FDA" have added the ADs at the comments. Is there any good method for us to prevent such behavior at imechanica? As one of the moderator, may I have the right to directly give such users name to system operator to prevent these trash ADs?

Any comments are welcome.

Ying Li

Finance and Mechanics

Submitted by Stefano Galiasso on

 

Recent events about the financial crisis and generally spread turmoils on Economics and Financial Environments  lead me to these conclusions.

Critical Speed:  informations, a key issue on finance, reached a critical speed. Maybe this is the "first" critical speed of the system. Speed of informations has reached the same order of magnitude of people's judgement (executives and investors more than others) so there's a sort of over-reaction about actual events.

iMechanica: 9000 registered users, 30,000,000+ web hits

Submitted by Teng Li on

The number of registered users of iMechanica reached 9000 on 13 October 2008, after two years and one month since the website launch. The total number of posts is 4036, the total number of comments is 8888, and the total web hits is estimated to be more than 30,000,000.



Hosted at Harvard School of Engineering and Applied Science and maintained by a growing number of volunteers, iMechanica aims

The post LHC universe?

Submitted by Biswajit Banerjee on

Most of you have heard about the commissioning of the Large Hadron Colider (LHC) by CERN and then the explosion of Helium followed by a postponement of operation until spring next year.  One of the worries some people had was that a mini black hole would be created by the collsions.  Also, the anthropic principle in one of its forms suggests that every possible universe exists but we see only our universe because it's the one in which intelligent observers exist.

How to ask a question on iMechanica

Submitted by Biswajit Banerjee on

I've mostly had quite helpful responses from iMechanica participants whenever I've asked questions on this forum.  However, I've noticed that questions from several posters have gone unanswered.  I feel that there are two main reasons for that lack of response:

1) The questioner has not provided an adequate details by which they can be identified.  I generally don't like responding to a question posed by someone called xyz1983. 

China: The prizes and pitfalls of progress

Submitted by Mike Ciavarella on

Remember when I spoke of the Easterlin paradox (a key concept in happiness economics postulated by Richard Easterlin in the 1974 paper "Does Economic Growth Improve the Human Lot? Some Empirical Evidence."[1]
It finds that, contrary to expectation, happiness at a national level

Mars and Venus - How Europeans and Americans View and Use Science - ESOF July20th -Part 1: The Eu Perspective -

Submitted by Mike Ciavarella on

From ESOF, an interesting presentation, attached. 

Mars and Venus

How Europeans and Americans

View and Use Science<

Part 1: The European Perspective

Dr Roland Schenkel, Director General, European Commission, Joint Research Centre (JRC)

 Some quotes