> Will trade a whole CD full of cad files for an
    > FEA on this 30 mm wide steel ring.
    >
    > The 40 mm dia. steel rollers exert a force of 2000 pounds or 900 Kg
    > radially outward. I also would like the contact stresses
    > as well if possible.
    >
    > The Rockwell hardness is C64.
    >
    > BTW does anybody know of any affordable FEA software?
    >
    > Paul Lamar ...No rotor no motor.


   Give me the modulus for each of the materials. The thickness would help
   as well. There will be edge effects.

   You can do this simple geometry by hand and get quite good results. Look
   up "Eulerian Stress" and you will have the formulas you need.

   The smart way to get cheap CAD and FEA software is to enroll in you
   local community college. For about $100 tuition, you become a "student"
   and qualify for the educational versions of very high-end software.

   Bill Dube.

   Thanks Bill See the previous message for the properties of 4340.
   But here are some better data.

     Density (lb / cu. in.)          0.28
   Specific Gravity        7.8
   Specific Heat (Btu/lb/Deg F - [32-212 Deg F])   0.116
   Melting Point (Deg F)   2600
   Thermal Conductivity    21
   Mean Coeff Thermal Expansion    6.6
   Modulus of Elasticity Tension   33 [million]

   I was perhaps a little low on the yield. More like 100,000 psi.

   Yes I was thinking of taking a class on tig welding :)
   I have a tig and I got a new LCD helmet for Christmas
   from my son. That is how I got my Rhino.

   I am homing in on a cheap 120,000 RPM turbo compound
   gear box. Mostly off the shelf parts.

   Paul Lamar ...No rotor no motor.


http://www.lisa-fet.com/indexbut.htm

Matt-

Hey thanks Matt looks like good FEA.

Paul Lamar

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