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Damping of Rubber

  1. Jun 2, 2014 #1
    Hey Guys,

    Can anyone tell me why the damping properties of rubber will decrease as the strain amplitude increases?

    Thanks
     
  2. jcsd
  3. Jun 3, 2014 #2

    Lok

    User Avatar

    Hi scriptymender,

    A quick link to get some fundamentals in place.
    http://en.wikipedia.org/wiki/Hysteresis#Hysteresis_in_mechanics

    Not sure if you mean compression or tension.

    There are a few effects that come in place as rubber gets stretched. Mechanically the speed of propagation of a wave in a string (v) is proportional to the square root of the tension of the string (F) (http://en.wikipedia.org/wiki/Vibrating_string), this affects the interaction time for internal friction and could result in a overall reduction.
    A more detailed explanation should require a look on the chemical/physical interactions that take place while the material is compressed or stretched, witch affects molecule alignment (compression stretches and aligns too) and overall Van der Waals interactions.
     
  4. Jun 3, 2014 #3
    Thanks a lot mate, I really appreciate your help!
     
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