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

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.

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Document Details

Document Type
Technical Report
Publication Date
May 04, 2023
Accession Number
AD1201816

Entities

People

  • John D. Clayton
  • Richard A Regueiro
  • Zachariah T. Irwin

Organizations

  • United States Army
  • University of Colorado Boulder

Tags

DTIC Thesaurus Topics

  • Blast
  • Bulk Modulus
  • Computational Fluid Dynamics
  • Computational Science
  • Continuum Mechanics
  • Differential Equations
  • Elastic Properties
  • Engineering
  • Equations
  • Fluid Dynamics
  • Fluid Flow
  • Hyperelastic Materials
  • Impulse Loading
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Porous Materials
  • Pressure Gradients
  • Shock Waves
  • Three Dimensional
  • Variational Equations
  • Wave Propagation

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Immunology and Pathology
  • Mechanical Engineering/Mechanics of Materials.