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A recruitment model of quasi-linear power-law stress adaptation in lung tissue.
Ann Biomed Eng 2007; 35(7):1165-74AB

Abstract

When lung tissue is subjected to a step in strain, it exhibits a stress adaptation profile that is a power function of time. Furthermore, this power function is independent of the strain, even though the quasi-static stress-strain relationship of the tissue is highly nonlinear. Such behavior is known as quasi-linear viscoelasticity, but its mechanistic basis is unknown. We describe a model of soft tissue rheology based on the sequential recruitment of Maxwell bodies. The model is homogeneous in its elemental constitutive properties, yet predicts both power-law stress relaxation and quasi-linear viscoelasticity even when the stress-strain behavior of the model is nonlinear. The model suggests that stress relaxation in lung tissue could occur via a sequence of micro-rips that cause stresses to be passed from one local stress bearing region to another.

Authors+Show Affiliations

Department of Medicine, University of Vermont College of Medicine, HSRF 228, 149 Beaumont Avenue, Burlington, Vermont 05405-0075, USA. jason.h.bates@uvm.edu

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

17380389

Citation

Bates, Jason H T.. "A Recruitment Model of Quasi-linear Power-law Stress Adaptation in Lung Tissue." Annals of Biomedical Engineering, vol. 35, no. 7, 2007, pp. 1165-74.
Bates JH. A recruitment model of quasi-linear power-law stress adaptation in lung tissue. Ann Biomed Eng. 2007;35(7):1165-74.
Bates, J. H. (2007). A recruitment model of quasi-linear power-law stress adaptation in lung tissue. Annals of Biomedical Engineering, 35(7), pp. 1165-74.
Bates JH. A Recruitment Model of Quasi-linear Power-law Stress Adaptation in Lung Tissue. Ann Biomed Eng. 2007;35(7):1165-74. PubMed PMID: 17380389.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A recruitment model of quasi-linear power-law stress adaptation in lung tissue. A1 - Bates,Jason H T, Y1 - 2007/03/23/ PY - 2006/03/15/received PY - 2007/03/01/accepted PY - 2007/3/24/pubmed PY - 2007/8/29/medline PY - 2007/3/24/entrez SP - 1165 EP - 74 JF - Annals of biomedical engineering JO - Ann Biomed Eng VL - 35 IS - 7 N2 - When lung tissue is subjected to a step in strain, it exhibits a stress adaptation profile that is a power function of time. Furthermore, this power function is independent of the strain, even though the quasi-static stress-strain relationship of the tissue is highly nonlinear. Such behavior is known as quasi-linear viscoelasticity, but its mechanistic basis is unknown. We describe a model of soft tissue rheology based on the sequential recruitment of Maxwell bodies. The model is homogeneous in its elemental constitutive properties, yet predicts both power-law stress relaxation and quasi-linear viscoelasticity even when the stress-strain behavior of the model is nonlinear. The model suggests that stress relaxation in lung tissue could occur via a sequence of micro-rips that cause stresses to be passed from one local stress bearing region to another. SN - 0090-6964 UR - https://www.unboundmedicine.com/medline/citation/17380389/A_recruitment_model_of_quasi_linear_power_law_stress_adaptation_in_lung_tissue_ L2 - https://doi.org/10.1007/s10439-007-9291-0 DB - PRIME DP - Unbound Medicine ER -