Read Prof Alistair Borthwick's (University College Cork, Ireland) March 2012 editorial for ICE journal Engineering and Computational Mechanics for free here. Link http://www.icevirtuallibrary.com/content/article/10.1680/eacm.2012.165.1.1
The damping ratio, used in quasi-static problems, such as sheet forming, stamping, forging, is that role, b, shown in the following equation
Ma+bCv=P-F
For the problems mentioned above, the value of b is about 0.1. if dynamic explicit method is employed, the simulation may encounters steady problem, while convergence problem for implicit method employed. I think, you can search some articles on damping in sheet metal forming, then you will understand the effect of this damping ratio.
hai
can we do laser machining of composites materials like glass fiber etc.. from simple laser machine or we have to use special fiber laser for this..please through some light on this topic....
I'm pleased to see that over 600 of you have at least read some of my comments and I wouldn't be surprise if not all of you read through to the end.
Mike Ciavarelli and I discussed the possibility of doing a comparison of Italian and British Universities. On reflection, I could not decide where to begin but wrote the attached. It is part personal experience, part history and part Charles Dickens who was born 200 years ago today. If you don't understand the connection, read on.
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
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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!
