Strain energy is the potential energy stored in a body when it is deformed elastically under applied load.
The strain energy stored in a bar = (P² × L) / (2 × A × E), where P = axial load, L = length, A = area, E = Young’s modulus.
Modulus of resilience is the strain energy stored per unit volume of material up to the elastic limit.
Strain energy is a form of potential energy and is measured in Joules (J).
Modulus of resilience = σ² / 2E, where σ is the stress and E is Young's modulus.
Proof resilience is the maximum strain energy stored per unit volume within the elastic limit.
Toughness is the total energy a material can absorb before fracturing, including both elastic and plastic deformation.
Rubber has a high modulus of resilience due to its ability to stretch and return elastically, storing large amounts of energy.
Resilience is concerned with the energy stored up to the elastic limit.
Resilience is the area under the stress-strain curve up to the elastic limit.