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Cam Follower Mechanism and energy efficiency

Submitted by Jigar Y. Patel on

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…

 

 

 

Those were not waves: A bit historical re. Huygens' principle

Submitted by Ajit R. Jadhav on

A few points that might be of general interest:

1. The dates: The date of Huygens' first written down material, which was orally presented to the French Academy of Sciences, is 1678---in contrast to the oft-quoted date of 1690. 1690 was the year of the first, French, publication of these notes (plus other material) in the form of a book.

What are all the physical significance/meaning that can be obtained from a STIFFNESS MATRIX ?

Submitted by Anonymous (not verified) on

Hi everybody,

 Can any one explain what is the physical meaning that a stiffness matrix illustrate ? I am a learner at a starting level in this Finite Element Analysis field . There are some questions which I wish to get an idea upon ...

 1. What exactly Stiffness Matrix tells about the structure ? Can you please explain with an example like "Linear Timoshenko Beam or Bernoulli beam or like 4-node plane stress element"....

 2. What is the relation between the eigen values of a stiffness matrix and the corresponding rigid body modes ? 

Looking for a PhD student

Submitted by pschiavone on

I am a professor in the Department of Mechanical Engineering at the University of Alberta, Edmonton, Alberta, Canada. I am looking for a PhD student to work in the area of applied mathematics, specifically in solid mechanics (linear elasticity, complex variable methods, boundary integral equation methods) with a possible start date of Sept 2012 or jan 2013.

You can find out more details at:

www.mece.ualberta.ca/~schiavone/schiavon.htm