TY - JOUR
T1 - Discrete quasi-linear viscoelastic damping analysis of connective tissues, and the biomechanics of stretching
AU - Babaei, Behzad
AU - Velasquez-Mao, Aaron J.
AU - Thomopoulos, Stavros
AU - Elson, Elliot L.
AU - Abramowitch, Steven D.
AU - Genin, Guy M.
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/5/1
Y1 - 2017/5/1
N2 - The time- and frequency-dependent properties of connective tissue define their physiological function, but are notoriously difficult to characterize. Well-established tools such as linear viscoelasticity and the Fung quasi-linear viscoelastic (QLV) model impose forms on responses that can mask true tissue behavior. Here, we applied a more general discrete quasi-linear viscoelastic (DQLV) model to identify the static and dynamic time- and frequency-dependent behavior of rabbit medial collateral ligaments. Unlike the Fung QLV approach, the DQLV approach revealed that energy dissipation is elevated at a loading period of ∼10 s. The fitting algorithm was applied to the entire loading history on each specimen, enabling accurate estimation of the material's viscoelastic relaxation spectrum from data gathered from transient rather than only steady states. The application of the DQLV method to cyclically loading regimens has broad applicability for the characterization of biological tissues, and the results suggest a mechanistic basis for the stretching regimens most favored by athletic trainers.
AB - The time- and frequency-dependent properties of connective tissue define their physiological function, but are notoriously difficult to characterize. Well-established tools such as linear viscoelasticity and the Fung quasi-linear viscoelastic (QLV) model impose forms on responses that can mask true tissue behavior. Here, we applied a more general discrete quasi-linear viscoelastic (DQLV) model to identify the static and dynamic time- and frequency-dependent behavior of rabbit medial collateral ligaments. Unlike the Fung QLV approach, the DQLV approach revealed that energy dissipation is elevated at a loading period of ∼10 s. The fitting algorithm was applied to the entire loading history on each specimen, enabling accurate estimation of the material's viscoelastic relaxation spectrum from data gathered from transient rather than only steady states. The application of the DQLV method to cyclically loading regimens has broad applicability for the characterization of biological tissues, and the results suggest a mechanistic basis for the stretching regimens most favored by athletic trainers.
KW - Discrete quasi-linear viscoelastic model
KW - Ligament
KW - Quasi-linear viscoelasticity
KW - Relaxation spectrum
KW - Storage and loss modulus
KW - Stress relaxation
UR - http://www.scopus.com/inward/record.url?scp=85009078259&partnerID=8YFLogxK
U2 - 10.1016/j.jmbbm.2016.12.013
DO - 10.1016/j.jmbbm.2016.12.013
M3 - Article
C2 - 28088071
AN - SCOPUS:85009078259
SN - 1751-6161
VL - 69
SP - 193
EP - 202
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
ER -