Author Topic: Deflection calculator or FEA freeware  (Read 6619 times)

Offline bry1975

  • Sr. Member
  • ****
  • Posts: 417
  • Country: gb
    • http://www.satintime.co.uk
Deflection calculator or FEA freeware
« on: July 08, 2011, 07:58:55 PM »
Can any of you chaps recommend a good deflection calculator or free FEA program, it's been some years since I've calculated any deflection.

TIA


Bry

Offline dickda1

  • Full Member
  • ***
  • Posts: 163
Re: Deflection calculator or FEA freeware
« Reply #1 on: July 08, 2011, 11:10:48 PM »
For finite element software, you might take a look here.

http://www.freebyte.com/cad/fea.htm#fea

I have used Lisa and a couple others.  But the basic problem with the freeware stuff is that the interface is difficult or essentially missing.  The expensive packages (Ansys, NASTRAN, CATIA, etc)  will help you generate a mesh, configure loadings and constraints, solve for deflection (or stress, etc), and visualize the results.

This stuff is fascinating to use, but one definitely needs a degree in mechanical engineering just to start.

If you are just interested in deflection, you might use formulas in the Machinist Handbook or Roark's Formulas for Stress and Strain.  They built bridges with this stuff in the days before modern computing. :thumbup:
-Dick

 
sunny (mostly) San Francisco, land of looney people, sane politics and occasional earthquakes.
Skype: VladTheChemist

Offline bry1975

  • Sr. Member
  • ****
  • Posts: 417
  • Country: gb
    • http://www.satintime.co.uk
Re: Deflection calculator or FEA freeware
« Reply #2 on: July 09, 2011, 12:59:26 AM »
Thanks Dick,

The only time I used a littie bit of FEA was with either Autocad 2000 or mechanical desktop 2 or 3 can't remember which one been a good 14years ago.

Only started looking at deflection again last night so need to remind myself of the technical nomenclature. :doh:

Found this calculator late last night but haven't tried it yet.

http://www.aps.anl.gov/APS_Engineering_Support_Division/Mechanical_Operations_and_Maintenance/Calculators/ElasticBeam2.html

Offline David Jupp

  • Sr. Member
  • ****
  • Posts: 276
  • Country: gb
  • Teesside - UK
Re: Deflection calculator or FEA freeware
« Reply #3 on: July 09, 2011, 04:20:12 AM »
"Engineers Toolbox" could be worth a look - it started out as an on-line free system with paid installable.  I don't like the way the pricing/licensing model has moved, but a 30 day trail is available.  Just search for ETBX.  If it has the calculation modules you need, it is pretty simple to use.

Offline bry1975

  • Sr. Member
  • ****
  • Posts: 417
  • Country: gb
    • http://www.satintime.co.uk
Re: Deflection calculator or FEA freeware
« Reply #4 on: July 09, 2011, 06:30:38 AM »
Thanks David,

It will be useful to check metal stiffness/deflection.

Offline dickda1

  • Full Member
  • ***
  • Posts: 163
Re: Deflection calculator or FEA freeware
« Reply #5 on: August 08, 2011, 12:04:30 AM »
I forgot to mention this one: Felipe - finite element package based on Fortran.

http://www.felipe.co.uk/

This is a really great finite element package that will allow one to visualize stresses and deflections in a part (among other many other things).

It was developed by a professor of mathematics at the University of Bath.  I bought a licensed copy about 15 years ago and like it.  The free package has many bells and whistles and is worth a download. :thumbup:

-Dick
sunny (mostly) San Francisco, land of looney people, sane politics and occasional earthquakes.
Skype: VladTheChemist

Offline bry1975

  • Sr. Member
  • ****
  • Posts: 417
  • Country: gb
    • http://www.satintime.co.uk
Re: Deflection calculator or FEA freeware
« Reply #6 on: August 08, 2011, 05:52:01 PM »
Thanks Dick,

Sound like a good program BUT will it run on linux?

And BATH what a lovely city shame about the terrible traffic congestion use to always dread dragging into BATH on the A4.

Offline jgroom

  • Jr. Member
  • **
  • Posts: 87
  • Country: us
  • Kansas USA
Re: Deflection calculator or FEA freeware
« Reply #7 on: August 09, 2011, 02:35:58 PM »
Hi Bry.

What distro are you using?  On Ubuntu 11.04 I just searched the software center and came up with 4 FE analyzer/mesh generator programs.  Z88, Gmsh, Elmer FEA, and Netgen.

Cheers

Jeff

Offline dickda1

  • Full Member
  • ***
  • Posts: 163
Re: Deflection calculator or FEA freeware
« Reply #8 on: August 09, 2011, 04:05:38 PM »
Jeff,

Yah, thats the thing.  If you are a Linux/Unix/BSD user the situation is far different.  There are loads of quality finite element packages out there.

The original gold standard is NASTRAN, developed under defense dept contract here in the States.  I would be surprised if it was not available in some form over Linux.

Go Linux. :thumbup:

-Dick
sunny (mostly) San Francisco, land of looney people, sane politics and occasional earthquakes.
Skype: VladTheChemist

Offline bry1975

  • Sr. Member
  • ****
  • Posts: 417
  • Country: gb
    • http://www.satintime.co.uk
Re: Deflection calculator or FEA freeware
« Reply #9 on: August 10, 2011, 07:53:46 PM »
Thanks chaps,

Looks good fun FEA not that I really need it but always good to test designs and calculations.