Blog posts

This may be interesting news for many of imechanicians. (according to pervious discussions)

From GOOGLE Blog:

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

Triangular elements with 2 coincident but untied nodes produce a 1/r variation of stress/strain field.

But the stress/strain field has a 1/√r singularity.

Can you tell me why or recommend me some papers taking about it.

hi

I constructed a head model, which includes muscle, soft tissue, skin and bone. I wrote user material subroutine (umat) for muscle and soft tissue, seperately. I am going to define the muscle and soft tissues properties by using my umats. However, I dont know how to define two user material subroutines (umat) in one model. The subroutines share the same name: subroutine umat(...). If I assign two umats, ABAQUS will be confused, wont know which subroutine to go. Is there anybody who knows how to sort this out?

Many thanks,

ben

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