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 biological tissues are viscoelastic?

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 is Poroelastic theory?

Definition. Poroelasticity is a field in materials science and mechanics that studies the interaction between fluid flow and solids deformation within a linear porous medium and it is an extension of elasticity and porous medium flow (diffusion equation).

Is soft tissue viscoelastic?

The structural response of soft tissues plays an important role in their normal physiologic function. Biological soft tissues exhibit complex nonlinear elastic (hyperelastic), nonlinear time-dependent (viscoelastic), and viscoelastic/inelastic failure behavior. …

What causes viscoelasticity?

Viscoelasticity is caused by temporary connections between fiber-like particles. Polymers always show a viscoelastic behavior because they consist of long molecules able to make temporary connections with their neighbors.

Why is bone viscoelastic?

Bone is a viscoelastic material, that exhibits both creep and stress relaxation. The ultimate strength,2 energy to failure3 and fracture toughness4 of bone tissue are rate dependent. At low frequencies, viscoelasticity was attributed to viscous-like motion at the cement lines.

What is viscoelastic behavior?

Viscoelastic behaviour is a combination of elastic and viscous behaviour where the applied stress results in an instantaneous elastic strain followed by a viscous, time-dependent strain.

What is Biot’s coefficient?

The Biot coefficient is the fluid volume change induced by bulk volume changes in the drained condition. Therein, the difference is attributed to the porosity effective pressure coefficient that serves as a measure for the deviation from the Biot prediction and accounts for microinhomogeneities.

Is human tissue viscoelastic?

Biological tissues are modeled as viscoelastic materials due to the manifestation of hysteresis in their stress relaxation behavior [21, 22].

What is viscoelasticity as a material property?

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.