http://thecostofknowledge.com/

If research projects are funded by public money, shouldn't their
results be available to the public at a reasonable price? or even free
of charge?
To prevent the monopolization of the scholarly record, read, think, and, hopefuly, support this cause. It is all I ask.

Hi guys, I'm a Telcommunication Engineer and I'm looking for an open source software to perform thermal simualiotn on a PCB (printed circuit board) with some LDMOS transistor installed to better understand the thermal behaviour.

Can you plese suggest me once?

 Thanks

 Davide 

As of 8 January 2012, the number of registered users of iMechanica exceeded 30,000 , the total number of posts is 11,690, the total number of comments is 18,000.  After five years and four months since its launch, iMechanica still keeps growing steadily.

Founded in September 2006, iMechanica aims

HI SIR/MADAM,

THIS IS SURYATEJASWI , MAM/SIR I NEED TO KNOW HOW DO I USE TIE CONSTRAINTS TO TIE UP THE SURFACE SKIN OF A CURVED PANEL AND STRINGER IF THEY ARE TO BE A SHELL ELEMENTS... PLZ SUGGEST ME WITH THIS PROLEM AND ALSO WITH MY PROJECT..

HOPE FOR THE BEST NEED

THANK YOU

Dear all

 I encouter this problem when I utilize finner mesh,while no such error was reported if a coarse mesh was used.

Could it be a problem of my computer's memory? But which memory exactly? (physical memory or the space for storage)

 I feel the calculation has not yet fully utilized my computer's physical memory according to the task manager. 

So, my questions are:

1. where possibly would the problem be?

2. how can i possibly address them?

Thanks in advance!

Regards

Wenjun

Hi All  Currently I am running FE modelling using linear elastic fracture mechanics approach to estimate crack growth propagation in a web plate of box girder in an existing bridge deck. The FE model includes 3D solid element. The crack growth direction is expected to follow in a plan perpendicular to the maximum principal stress.  As I know there are many methods can be used to estimate the direction of crack during propagation. My question is about the maximum tangential stress criterion method.

sir,

I need to find out kinetic energy of the element in the harmonic analyis problem of a plate.

i am using ansys command...in /post1

etable,KE,KENE

but no data is stored on the lable KE

please help and suggest some other means to do the same...or the correct method of issuing this command ..

 thanks

dileep

Dear Mechanicians,

I have got an offer to do PhD in computational seismology in a very good university in Europe, however, I have no idea what sort of career I should expect after getting my PhD in this field. I got my BSc and MSc in mechanical engineering but have never worked in the field of geophysics and seismology. Therefore I am hesitating whether to take the offer or not. 

Could some of you help me to get a better image of what a computational seismologist would do. Is the career restricted to universities and national seismological service centers? Do you think the market for such field is more restricted than for e.g. mechanical enginerring?

Thank you!

Pegah 

This is an interesting article: Fraud, the h-index and Pasternak. How do we evaluate ourselves and others, especially those not in our own fields? We may not have to find an answer as an individual researcher, but the univeristy adminstrators have to.

Hi, everyone:

I am using ABAQUS to do my final dissertation:nonlinear analysis of steel members.

I want to apply UNIFORMLY DISTRIBUTED LOAD to the middle height of the web, I splited the web into top and bottom parts,but nomatter I use 'LINE LOAD' OR 'SHELL  edge LOAD' ,it does not work at all.

Thank you so much in advance, any opinion is welcome.

'Like' our new Elsevier Engineering page on Facebook www.facebook.com/elseviereng and find the code to take advantage of a 30% discount off our Engineering books! 

Normal.dotm
0
0
1
146
837
utm
6
1
1027
12.0

0
false

18 pt
18 pt

What is d significance of temperature rise in VAR & VCR, as in VCR after compression the temperature increases as a consequence of pressure rise and in VAR we heat the mixture to separate absorbent. Is it a coincidence or some logic behind it?

Even Jay Leno tried to understand fatigue cracks at his Yesterday’s Tonight Show, our research on fracture and failure mechanics is received great attention from the general public. Read more after this photo--

Discussion of fracture paper # 1

The  paper discussed is:

Ehsan Barati, Younes Alizadeh, Jamshid Aghazadeh Mohandesi,
"J-integral evaluation of austenitic-martensitic functionally graded steel in plates weakened by U-notches",
Engineering Fracture Mechanics, Vol. 77, Issue 16, 2010, pp. 3341-3358.

The imechanica node for the discussion: discussion of paper #1 .

Discussion of fracture paper # 2

The papers under discussion:

J.C. Sobotka, R.H. Dodds: Steady crack growth in a thin, ductile plate under small-scale yielding conditions: Three-dimensional modelling.,
Engineering Fracture Mechanics, Vol. 78, 2011, pp. 343-363.

The imechanica node for the discussion: discussion of paper #2 .

Discussion of fracture paper # 3

The paper under discussion:

H. Krull and H. Yuan: Suggestions to the cohesive traction–separation law from atomistic simulations. Engineering Fracture Mechanics, Vol. 78, 2011, pp. 525-533.

The imechanica node for the discussion: discussion of paper #3 .

This is a premiere: my first contribution to the new ESIS' blog announced in January. Why comment on papers in a scientific journal after they have passed the review process already? Not to question their quality, of course, but animating a vital virtue of science again, namely discussion. The pressure to publish has increased so much that one may doubt whether there is enough time left to read scientific papers. This impression is substantiated by my experience as a referee. Some submitted manuscripts have to be rejected just because they treat a subject, which conclusively has been dealt years before - and the authors just don’t realise.
So much to my and Stefano’s intention and motivation to start this project.

Here is my first “object of preference”:

Ehsan Barati, Younes Alizadeh, Jamshid Aghazadeh Mohandesi, "J-integral evaluation of austenitic-martensitic functionally graded steel in plates weakened by U-notches", Engineering Fracture Mechanics, Vol. 77, Issue 16, 2010, pp. 3341-3358.

Hello friends,

I am doing My Graduation in Mechanical, right now i am on a project and want to simulate Forging cylinderical billets in order to optimise the process parameters, hence it is required to optimize the process parameters like temp., speed , stroke, material flow etc. as a function of Die design and friction. I want to simulate it in ANSYS plz help me how to go for it, because finally i want stress, strain rate, strain, material flow as the final  result. 

Yesterday, as I was waiting for the rain to stop before I could walk home from work, a stranger accosted me in the lobby of the building.  He asked me what I did, to which I replied "Mechanics".  He mulled over the answer for a bit and asked me to be more specific, at which point I said that we were trying to design materials that could guide waves around objects.  He said "Water waves?".  I replied "All types of waves."  Clearly, common words can mean quite different things to different people.

Dear members:

 I have some basic question:

What is a homogeneous beam? why do we use homogeneous beam ? what are the characteristics of homogeneous beams?

and Where do we use these beams? and what is beam homogenization ?

As we known,  boundary element method (BEM)  is a quite popular numerical  method.  But there are some problems. My research fields are computational mechanics and BEM (including fast BEM).  We can discuss these fields in this blogs. I am waiting for you! Thanks

Hi,

   Just need help to find out how to read results at intergration points in Shell Elemnts in ansys. I need 5 integration points across the thickness of my model.

Thanks in advance

Bala