Abstract
Lung parenchyma consists of millions of interconnecting cellular units, called alveoli, that are homogeneously distributed between two parallel repeatedly branching networks, the pulmonary airways and vasculature. On the alveolar scale (100 μm) the forces in the tissue membranes are heterogeneously oriented. However on a scale that encompasses several alveoli, the macroscopic properties of lung parenchyma can be defined in terms of average stesses and average strains. On this scale the lung parenchyma is fairly homogeneous and isotropic (1). For small quasistatic deformations, the lung parenchyma is assumed to behave elastically. However, the lung is known to exhibit both viscous and plastic properties. The lung also undergoes changes in volume that are outside the range of linear elasticity. For large changes in volume, the inelastic behavior of the lung is accentuated. Thus, the concept of elasticity as applied to the lung is restricted to small changes in distortion.
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© 1990 Springer-Verlag New York, Inc.
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Lai-Fook, S.J. (1990). Lung Tissue Mechanics. In: Epstein, M.A.F., Ligas, J.R. (eds) Respiratory Biomechanics. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3452-4_4
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DOI: https://doi.org/10.1007/978-1-4612-3452-4_4
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