Question

How can one calculate the workdone or energy from the stress-strain graph of rubber.

Answer 1

Explanation:

Strain Energy Formula

δ = compression,

When stress σ is proportional to strain ϵ, the strain energy formula is given by,

σ = stress.

U = σ2 / 2E × V.

σ = stress,

U = Fδ / 2.

= 1000 ×1.2×10−3 / 2.

A rod of area 90 mm2 has a length of 3 m. Determine the strain energy if the stress of 300 MPa is applied when stretched.

Answer 2

Answer

❥ The energy stored in the rubber band is determined by the bands k value (k is called the spring constant), and how far the rubber band is stretched. For each rubber band type, using the formula PE = ½kx2, calculate the “maximum” elastic potential energy (PE).

All the best :)