A Large Deformation Multiphase Continuum Mechanics Model for Shock Loading of Lung Parenchyma. Part III: Numerical Simulations

Author(s):

Zachariah T Irwin, Richard A Regueiro, and John D Clayton

Abstract:

Simulations obtained from a 1-D numerical implementation of a finite-strain theory of a biphasic mixture are reported. The theory includes coupled pore fluid flow and solid skeleton deformation for a soft porous material applicable to high strain-rate dynamic loading. The constitutive model is non-linear elastic and accounts for the compressibility of the pore air. General features of the constitutive description are specialized for an application to shock loading of lung parenchyma. This report focuses on representative numerical simulations of the lung, invoking the 1-D finite element formulation of the multiphase theory and nonlinear constitutive models. Verification studies and predictive simulations for dynamic deformation of the lung are reported. Shock wave-type loadings are of prominent interest in this document, which is the third in a series of three reports.