Which structure is an example of the viscoelastic material in the human body?

Bone is a viscoelastic material, that exhibits both creep and stress relaxation.

What is viscoelastic effect?

In materials science and continuum mechanics, viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation. Viscous materials, like water, resist shear flow and strain linearly with time when a stress is applied.

What viscoelastic means?

Definition of viscoelastic : having appreciable and conjoint viscous and elastic properties such viscoelastic materials as asphalt also : constituting or relating to the state of viscoelastic materials viscoelastic data viscoelastic properties.

Why are viscoelastic materials important?

Almost all of biological tissues are viscoelastic and their viscoelastic mechanical properties are important in their characteristic functions. This is because constituents of tissues cells, extracellular matrices, structural proteins, and so on are viscoelastic. Even hard tissues have been shown to be viscoelastic.

What are the properties of viscoelastic materials?

There are three main characteristics of viscoelastic materials: creep, stress relaxation, and hysteresis. The creep phenomenon is used to describe the continued deformation of a viscoelastic material after the load has reached a constant state (Fig. 5.4A).

What does it mean when we say that tissues in the body have viscoelastic properties?

Viscoelasticity refers to the tendency of a material to act like both a solid and a fluid.

What shows viscoelastic Behaviour?

Thermoplastic materials, at temperatures below their glass transition temperatures, and thermosets are brittle elastic solids but thermoplastics, above Tg, show viscoelastic behaviour. In a viscoelastic material the deformation under stress is time-dependent and the phenomenon of creep can occur.

What is viscoelastic in cataract surgery?

Viscoelastics, also referred to as ophthalmic viscosurgical devices, or OVDs, are viscous substances that allow us to make phacoemulsification easier and safer. Once the first incision is made into the eye, it has a tendency to collapse as the aqueous leaks out.

What are viscoelastic materials used for?

Viscoelastic materials are used for isolating vibration, dampening noise, and absorbing shock. They give off the energy absorbed as heat.

What is a viscoelastic mattress?

The viscoelastic mattress is made of elastic foam, also called memory foam. Viscoelastic foam compresses due to pressure and body heat, adapting optimally to body contours. Recently, the viscoelastic mattress has enjoyed wide popularity and is appreciated for its snug and cosy feeling during sleep.

Is viscoelasticity reversible?

Viscoelastic materials present a reversible response (i.e. they can return to the initial state) which depends on the rate of the applied loading.

What is the viscoelastic response of material?

The viscoelastic response of material is typically analyzed in terms of complex modulus of elasticity: where real E ′ (storage) and imaginary E ″ (loss) components of complex modulus E, as well as their ratio, termed tan δ: are experimentally determined via measuring the stress response to the applied oscillatory deformation.

What is the meaning of viscoelasticity?

Viscoelasticity is the time-dependent anelastic behaviour of materials. This means that the response to a stimulus is delayed, and there is a loss of energy inside the material. Viscoelastic behaviour normally occurs at different time scales (relaxation times) in the same material.

What is the relationship between strain and strain lag in viscous materials?

In purely viscous materials, strain lags stress by a 90 degree phase. Viscoelastic materials exhibit behavior somewhere in the middle of these two types of material, exhibiting some lag in strain. A complex dynamic modulus G can be used to represent the relations between the oscillating stress and strain:

What is the dynamic modulus of a viscoelastic material?

Viscoelastic materials exhibit behavior somewhere in the middle of these two types of material, exhibiting some lag in strain. A complex dynamic modulus G can be used to represent the relations between the oscillating stress and strain: is the phase shift between them.