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Elasticity of annular disc

  1. Oct 4, 2011 #1
    Hi,

    I have an annular disc that looks like the following:

    Rubber-Backing-Pad-0582282.jpg

    I need to get the elasticity of the material, since I don't have any information on it. Does anyone have any suggestions on how I can calculate the elasticity?

    Maybe I can get a force/displacement curve by bending the disc (held at the center)? I have equipment to do that. But how can I use that information to get the modulus?

    Any help will be appreciated :)

    Thanks & Regards,

    Umer
     
  2. jcsd
  3. Oct 4, 2011 #2

    Mapes

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    Hi umer_majid, welcome to PF!

    One approach is to model the geometry by finite element analysis, obtain the force/displacement response, and match that to experiment. Another is to find someone to perform nanoindentation on the material to measure its stiffness. Another (destructive) method is to cut out a rectangular section and perform uniaxial testing on it.
     
  4. Oct 10, 2011 #3
    I dont know the dimensions of your annular disc, but if you only need Young module and the material is not plstic (no linear elasticity) , may be you can try test without cut. Use the clamp to clamping at both sides of one radio.
     
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