Connecting incremental shear modulus and Poisson’s ratio of lung tissue with morphology and rheology of microstructure

Issue title: Stanley Mason Memorial Issue

Guest editors: Harry L. Goldsmith

Article type: Research Article

Authors: Fung, Y.C.

Affiliations: Department of AMES-Bioengineering, Mail Code R-012, University of California, San Diego, La Jolla, California, 92093, U.S.A.

Abstract: The width and curvature of the collagen and elastin fiber bundles in the human pulmonary interalveolar septa and alveolar mouths are measured. The data, together with the known mechanical properties of collagen and elastin fibers, are used to derive the incremental elastic moduli of the lung tissue. The constitutive equation for small incremental stress and strain superposed on a homeostatic inflated lung is linear and isotropic, and characterized by two material constants.

Keywords: Microrheology, Alveolar duct, Elasticity, Incremental Moduli, Pulmonary ductal tree, Constitutive equation

DOI: 10.3233/BIR-1989-26213

Journal: Biorheology, vol. 26, no. 2, pp. 279-289, 1989