A few weeks ago I had mentioned in one of my comments that

"Almost every object that is used in modern societies contains some
material that has been extracted from the earth.  A huge amount of
energy is used in crushing rocks to a fine enough size that surface
chemistry may then be used to extract a particular metal.  Assuming
that we would like to use energy more efficiently, is there a way our
knowledge of mechanics can be used to minimize the energy used in
crushing rocks?  A huge number of people have worked on this problem -
yet an optimal solution seems as far away as ever. "

A meeting with my ex-classmate Dr. Barun Gorain of Barrick Gold Company  last weekend showed me that there are still quite a few problems of that nature in the mining industry.  In fact, Barrick is willing to spend as much as $10 million to solve one such problem.  The main site is called Unlock the Value and the bit that they are willing to offer cash for is a particular silver recovery operation.  Barun tells me that proposals are already in and are being evaluated - but I'm not sure whether those are for the silver problem or some other issue.   Can mechanicians help solve the problem?  Some of you might want to give it a try.

-- Biswajit 

Hellow colleagues

I'm an equipment designer and i need to verify the stresses on the shell of an horizontal vessel over 3 saddles. I don't want to make a FEA analysis because is quite expensive to me.

Hiya,

I have different stress strain curves at different hours (1hr, 10hr, 100hr).  for a constant stress, the strain increases with increase in number of hours(creep)

They look like stress-strain curves at different strain rates.

now I want to define a material card with these curves with above mentioned number of hours.

I kindly request you to suggest me a CARD in ABAQUS which takes care of this behavior.

Thanks a ton for your help, in advance !

-Balappa.

We are designing a underslung crane with 4 end trucks (3 spans). The crane girder is made of Universal Beam (UB). Can someone help to calculate the first fundamental (natural) frequency of the beam?
Thanks

I'm attaching slides of a talk that I gave yesterday at the Schlumberger-Doll Research Center.  In preparing the talk, I made liberal use of slides prepared by Wei Hong for his own presentations.  The talk is mainly based on the following papers:

Hi..

 Anyone here could help me out as to how to use abaqus for analyzing the back plate of the drum brakes??

and also.... please give me some website where in i cud get some tutorial stuff for abaqus. im starting to learn abaqus.

 thanks.

  I am ram

i want to know how to improve wettability of reinforcement

anybody know the coating procedure of carbon or nickel to particulate reinforcements

Hi everybody,

 i?m simulating a manufacturing chain finite elements analysis. Every step of this chain have been developed by different software. I use ANSYS. Somoone know how to impose the initial strain and stress state deriving from previous simulations to my ansys model: I'm able to use INISTATE command but only stresses are imported, I loose initial strain info: are they important if my material is elasto plastic? how i can resolve the problem?

Thanks in Advance Michele

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This blog collects news related to Energetic Materials Science and Engineering

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A year ago in my first post, The Future of Ink, I explored e-ink technology and the e-book concept when the potential was still largely unseen. But since then, the industry has completely transformed, and the prospect of the e-book is beginning to be realized.

hello guyes!

I have meet a question when design a composite structure, I just have some materials such as UN, DB, and some loads vector, what shoul I to determine the numbers and array of laminates? 

How to mesure sensitive mechanical vibrations

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