Damping coefficient in damping mechanisms

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SUMMARY

The discussion focuses on calculating the damping coefficient (c) for a damping mechanism using rubber as the material, specifically with a loss factor (η) of 0.075. The user seeks to determine c for the term c*dx/dt based on the defined geometry of the element. A suggestion is made to estimate c experimentally using a damped oscillator, with a reference to a relevant measurement technique found in a linked PDF document.

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Vaggelis
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Hello everyone,

I am trying to design an element that its purpose is providing stiffness and damping. The material that I wish to use is rubber.

My question is, how can we calculate the damping coefficient (c) for the calculation of the term c*dx/dt, when we know the loss factor of the material (for example η=0.075 for rubber) and the geometry of the element is defined.

Thanks in advance.

Vaggelis
 
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Vaggelis said:
My question is, how can we calculate the damping coefficient (c) for the calculation of the term c*dx/dt, when we know the loss factor of the material (for example η=0.075 for rubber) and the geometry of the element is defined.

i remember to have used a damped oscillator and c can be estimated experimentally. one can see the following for measurement...
http://www.engineeringmechanics.cz/pdf/14_1_013.pdf
 

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