Elastomer Energy Return

[danielcarroll148]

Hello,

I'm developing a product which requires a shock absorbing elastomer to compress slightly during an impact, then rebound providing energy return, similar to how some running shoes give a spring like effect.

I'm just trying to clarify, does the rebound / energy return occur when

• The force causing the compression is removed, or
• It is related to the natural frequency of the material. I.e. the energy return occurs after a period of time in accordance with the frequency of the elastomer.

I'm finding conflicting information so I'm just looking for clarity.

Thanks in advance

[Cragyon]

Energy return = (Energy in) - (Energy absorbed).

You need to estimate the Transmissibilty of the elastomer, then Natural Frequency and compare to application. This will give you an idea on the return energy.

engineering_guide_ip (1).pdf