Constitutive Modelling of the Shock Behaviour of a Highly Porous Material

Abstract

The report studies the constitutive behaviour of highly porous materials. This study is driven by efforts for the development and validation of a multi-phase modelling capability in DSTO, which aims at an enhanced evaluation of blast mitigation by porous materials. A two-phase model is employed for the description of a porous material, for which experimental shock velocity data are widely available in literature. The method deriving Hugoniots from the shock velocity data is critically approached. The importance of the non-equilibrium behaviour analysis is demonstrated, and it is shown that the stress or velocity profiles need to be considered, using relevant experiments% and constitutive modelling. It is argued that the apparent anomalous behaviour of the Hugoniots of a highly porous material might be caused by misinterpretation of the experimental data.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2007
Accession Number
ADA476590

Entities

People

  • A. D. Resnyansky

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Constitutive Equations
  • Copper
  • Equations
  • Equations Of State
  • Experimental Data
  • Explosive Devices
  • Explosives
  • Heat Transfer
  • Mechanical Properties
  • Mechanics
  • Numerical Analysis
  • Porous Materials
  • Standards
  • Strain Rate
  • Test And Evaluation
  • Weapons
  • Weapons Effects

Fields of Study

  • Engineering

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Reinforced Composite Materials
  • Systems Analysis and Design