What is tissue viscoelasticity?
What is tissue viscoelasticity?
Biological tissues are modeled as viscoelastic materials due to the manifestation of hysteresis in their stress relaxation behavior [21, 22]. The word viscoelastic is a combination of viscous fluidity and elastic solidity, and thus, biological materials under stress and strain exhibit both viscous and elastic behavior.
What is the phenomenon of viscoelasticity?
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 is viscoelasticity example?
Typical examples of viscoelastic materials are spaghetti, shag (tobacco), a pile of worms moving through each other and (of course) polymers. Polymers are always viscoelastic because they consist out of long molecules which can be entangled with their neighbors.
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).
How is viscoelasticity measured?
In industries such as biomaterials, viscoelasticity is often measured by applying a sinusoidal force, calculating the resulting strain response and determining the elastic-spring-like storage modulus and the flow-like loss modulus. Such dynamic mechanical analysis can be performed as a bench test or deployed in-situ.
What is viscoelasticity of muscle?
A MATERIAL’S ABILITY TO DAMP MOVEMENT BY BECOMING STIFFER AT HIGHER RATES OF ELONGATION.
What is viscoelasticity of polymer?
2.1 Introduction. Viscoelastic materials are those which exhibit both viscous and elastic characterists. Viscoelasticity is also known as anelasticity, which is present in systems when un- dergoing deformation. Viscous materials, like honey, polymer melt etc, resist shear.
What is viscoelasticity of polymers?
One important characteristics of polymeric materials is their viscoelastic behavior. This means that polymer is elastic because after a strain due to the application of a stress, it is capable to recovers. On the other hand, polymers are viscous because their capability to creep after the strain.
What is the difference between elasticity and viscoelasticity?
The difference between elastic materials and viscoelastic materials is that viscoelastic materials have a viscosity factor and the elastic ones don’t. Purely elastic materials do not dissipate energy (heat) when a load is applied, then removed; however, a viscoelastic substance does.
What is polymer viscoelasticity?
What is Linear viscoelasticity?
Linear viscoelasticity is an extension of linear elasticity and hyperelasticity that enables predictions of time-dependence and viscoelastic flow. From: Fluoropolymers Applications in the Chemical Processing Industries, 2005.
