Viscoelasticity is an elastic property in which strain and stress are proportional to the elastic modulus as a coefficient, like a spring, and a viscous property in which strain rate stress is proportional to the viscosity as a coefficient, like a liquid.
and viscous like a liquid where the strain rate stress is proportional to the viscosity coefficient.
Visco-elasticity is a property of both elasticity and viscosity.
A familiar example of viscoelasticity is slime, which is a toy.
(1) Elastic properties
Drop a rounded slime on the floor and give it a sudden deformation ➡Bounces like an elastic body
(2) Viscous property
Leave the rounded slime alone ➡ Flows like a viscous body
Viscoelasticity is explained above, but resins have similar properties.
Resins also change with temperature, approaching elastic behavior at lower temperatures and viscous behavior at higher temperatures, so the process of injection molding, which involves melting and cooling resins, requires a thorough understanding of viscoelastic properties.
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