viscoelasticity
Sign in to saveViscoelasticity is a material property that combines both viscous and elastic characteristics. Many materials have such viscoelastic properties, especially materials that consist of large molecules. Polymers are viscoelastic because their macromolecules can make temporary entanglements with neighbouring molecules which causes elastic properties. After some time these entanglements will disappear again and the macromolecules will flow into other positions where new entanglements will be made (viscous properties).
Article
25 sectionsContents
- Background
- Elastic versus viscoelastic behavior
- Linear viscoelasticity and nonlinear viscoelasticity
- Dynamic modulus
- Constitutive models of linear viscoelasticity
- Maxwell model
- Kelvin–Voigt model
- Standard linear solid model
- Jeffreys model
- Burgers model
- Generalized Maxwell model
- Constitutive models for nonlinear viscoelasticity
- Second-order fluid
- Upper-convected Maxwell model
- Oldroyd-B model
- Wagner model
- Prony series
- Effect of temperature
- Viscoelastic creep
- Measurement
- Shear rheometry
- Extensional rheometry
- Other methods
- See also
- References
Viscoelasticity is a material property that combines both viscous and elastic characteristics. Many materials have such viscoelastic properties, especially materials that consist of large molecules. Polymers are viscoelastic because their macromolecules can make temporary entanglements with neighbouring molecules which causes elastic properties. After some time these entanglements will disappear again and the macromolecules will flow into other positions where new entanglements will be made (viscous properties).
A viscoelastic material will show elastic properties on short time scales and viscous properties on long time scales. These materials exhibit behavior that depends on the time and rate of applied forces, allowing them to both store and dissipate energy.