[ REQ 6030]: Re_FElt_format

[62e509 at nstn.arch.waseda.ac.jp]

Thank for your reply!

>Hi.  I don't think we've heard about "FElt" format.  Although some of our
>users have told us they've made geomview work as a display for a
>finite-element package, no one has mentioned "FElt".  Can you tell us 
>anything more about it?

FElt is one of my favorite software packages dealing with general 
Finite Element Analysis. 
It is  coded by Jason I. Gobat and Darren C. Atkinson, 
authorized by GNU public license.

 Now I am designing a building with the FElt packages, and  
I need input-output data(forces, stresses) 
in DXF file format(general CAD format). 
FElt presents a file-transformer "patchwork" to translate
FElt format into DXF format, 
however, input forces, loads, constraints 
and output stresses for linear elements like trusses, beams 
cannot be transformed into DXF format.
  So, I have sent a e-mail to FElt author "Jason I. Gobat" about it, 
He told me 
  "Someone has recently done extensions to patchwork to translate files
  into a format that geomview would understand - and this translation
  included representations for forces, loads and constraints."

I thought some geomview users knew about it, and sent a-email for you.  
If you have some advice for me, Please send a e-mail. 

Sincerely yours, 

Nariyasu YAMADA
Dept. of architecture, 
Waseda Univ., Tokyo
e-mail: 62e509 at nstn.arch.waseda.ac.jp

P.S.

A simple example for FElt file format is the following.

############ an example for  FElt input file format ##############

problem description
title="Beam Sample Problem (Logan #5.5, p.188)" nodes=3 elements=2

nodes
1 x=0   y=0 force=point_load   constraint=free
2 x=240 y=0 constraint=roller
3 x=480 y=0 constraint=fixed

beam elements
1 nodes=[1,2] material=steel
2 nodes=[2,3] material=steel

material properties
steel e=30e6 ix=100 a=10

forces
point_load fy=-1000

constraints
roller tx=u ty=c rz=u
fixed tx=c ty=c rz=c
free tx=u ty=u rz=u

end

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