Choose a component based on either U1 or U2 merit index and select what you believe to be the optimum material.
U1=(σ)^2/E (Energy density)
U2=(σ)^2/(Eρ) (specific energy density)
The Attempt at a Solution
I was going to use a spring damper from a bike as the component and apply U2, however are there any other more interesting examples I can use the merit indexes on?