iMechanica - Comments

Hi All I m working on

mohammad yahari — Wed, 16 May 2012 15:53:59 -0400

Hi All

I m working on plastic connectors who can help me about this.

Thanks

Mohammad

Kewei, Thanks for the

Jingwen Zhang — Wed, 16 May 2012 15:09:58 -0400

Kewei,

Thanks for the reply. The problem is now solved by installing VS version 2008 and Intel Fortran version 11.1. I also met several other errors after installing the compatible software, and finally solved the problems by following the instructions in these posts:

http://software.intel.com/en-us/articles/troubleshooting-fortran-integration-issues-with-visual-studio/

http://polymerfem.com/showthread.php?1602-Abaqus-error-message-quot-LINK-is-not-recognized-quot

http://www.eng-tips.com/viewthread.cfm?qid=202712

Hope those who met the same problem with mine can get helpful infomation there.

Regards,

Jingwen

want to apply for this PhD Position

Harsha Tirumala — Wed, 16 May 2012 08:11:03 -0400

Are International Students eligible to apply ?

I understand how to

Jerry Brown — Tue, 15 May 2012 16:44:50 -0400

I understand how to calculate the Almansi strain. That's covered quite well in many texts on Solid Mechanics. My question is, "How is it used to make calculations?" No one seems to address that issue - Fung, Bower or Holzapfel.

hi is it possibile for

aliadib — Tue, 15 May 2012 16:15:34 -0400

is it possibile for students with PhD degree to apply for this position ?

many thanks

ali adib

Reply

HussamNasreddin — Tue, 15 May 2012 11:36:06 -0400

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Dear Frank,

Thanks for your reply. I have joined the Google group you
proposed, I noticed your generous contribution to helping others there too.

However, many of the links to websites didn’t work on my PC
for some reason including the one here in your message. http://imechanica.org/files/Writing

I would like your opinion on to how to practice writing
UMAT/VUMAT subroutines as I am a beginner. Is there a starting step that you
would recommend because I don’t understand what and how commands are written in
the script.

I didn’t find the manual helpful for this purpose; don’t
know if you would agree?

If you also could provide a VUMAT/UMAT on elasticity, it would
be great. I could then understand its components and apply a state variable
accordingly.

I realise that this is quite a bit to ask for but your help
is very much appreciated.

Many thanks again

Hussam Nasreddin

ESPI hardware

vicsv — Tue, 15 May 2012 10:17:47 -0400

I think you have hardware limitation. Maybe framerate is unsufficient.

I'm not familiar with Optonor software. If you have camera with 40 fps and you use a phase-shifting algorithm, you need about 0,1s to record images. During this time displacements of the tested objects must be less then lambda/10 (lambda is a laser wavelength).

You can try to make smaller ROI to increase framerate of images grabbing.

Another problem could be if inplane displacements are significantly bigger than out-of-plane displacements. This can lead to decreasing or vanishing of a fringe contrast.

You can record fringe patterns without phase-shifting algorithm to avoid averaging. It is requires manually calculation of fringes and computation of deformation using simple formula, but this is hard and time consuming job.

Strain

Kewei Li — Tue, 15 May 2012 00:08:15 -0400

Y C Fung talked about it in his book. I remeber he mentioned how to calculate it from displacement.

Abaqus

Kewei Li — Mon, 14 May 2012 23:31:26 -0400

It looks like you have a problem with Intel Fortran compiler. Make sure you install the right version.

Re: work conjugacy

Amit Acharya — Mon, 14 May 2012 14:55:50 -0400

I actually took a quick look through the paper when it appeared but could not find it discussed in the text - may be I just missed it.

Re: work conjugacy

Arash_Yavari — Mon, 14 May 2012 14:33:21 -0400

Hi Amit,

Yes, it is definitely relevant (has been cited in this paper).

Regards,
Arash

work conjugacy

Amit Acharya — Mon, 14 May 2012 14:26:57 -0400

Arash,

Speaking of references, pages 14 (make it 12) - 23 of Hill's Aspects of Invariance in Solid Mechanics paper seems to be quite relevant for the present discussion.

- Amit

Please help me out

mashfiq7777 — Mon, 14 May 2012 13:26:43 -0400

Dear civilmh

Please help me out to model RCC Column/Beam using ANSYS (v 10,0) and also CFRP wrapping for my Ph.D thesis work. I cant model Reinforced Concrete and dont know how to apply reinforcement.

My Email address is mashfiq7777@yahoo.com

Thank you.

Mashfiq

RCC Column modeling in ANSYS and also CFRP wraping

mashfiq7777 — Mon, 14 May 2012 13:20:48 -0400

Dear All

Please help me out to model RCC Column/Beam using ANSYS (v 10,0) and also CFRP wrapping.

My Email address is mashfiq7777@yahoo.com

Thank you.

Mashfiq

Thanks

rks2010 — Mon, 14 May 2012 07:30:50 -0400

Haeriest thanks for shearing such an unforgettable papers. Paper have a alot of information which is very much fruitful to me.

One's again thanks Dr. Foo for shearing this.

Thanking You

RajKumar sahu

Phd Scholar
IIT Patna