Viscoelasticity of biological materials - measurement and practical impact on biomedicine

Title:

Viscoelasticity of biological materials - measurement and practical impact on biomedicine

Creator:

Kuchařová, M., Stanislav Ďoubal, Petr Klemera, Petr Rejchrt, and Navrátil, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:5d43a9da-006e-40e4-a0a0-5b162eab9e28
uuid:5d43a9da-006e-40e4-a0a0-5b162eab9e28
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, viskoelasticita, kosti, kůže (anatomie), viscoelasticity, bones, skin, arterial walls, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

Mechanical behavior of biological structures under dynamic loading generally depends on elastic as well as viscous properties of biological materials. The significance of “viscous” parameters in real situations remains to be elucidated. Behavior of rheological models consisting of a combination of inertial body and two Voigt’s bodies were described mathematically with respect to inverse problem solution, and behavior in impulse and harmonic loadings was analyzed. Samples of walls of porcine and human aorta thoracica in transverse direction and samples of human bone (caput femoris, substantia compacta) were measured. Deformation responses of human skin in vivo were also measured. Values of elastic moduli of porcine aorta walls were in the interval from 102 kPa to 103 kPa, values of viscous coefficients were in the interval from 102 Pa.s to 103 Pa.s. The value of shear stress moduli of human caput femoris, substantia compacta range from 52.7 to 161.1 MPa, and viscous coefficients were in the interval from 27.3 to 98.9 kPa.s. The role of viscous coefficients is significant for relatively high loading frequencies - in our materials above 8 Hz in aorta walls and 5 Hz for bones. In bones, the viscosity reduced maximum deformation corresponding to short rectangular stress., M. Kuchařová, S. Ďoubal, P. Klemera, P. Rejchrt, M. Navrátil., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2007 Volume:56 | Number:Suppl 1

Harvested from:

CDK

Metadata only:

false