Plastic Deformation of Granular Materials

Abstract

This project combines analytic and computational investigations to understand the dynamics of elastic-plastic deformation of granular materials, particularly issues related to the formation of shearbands. Roughly speaking, shearbands form when the governing equations cease to be wellposed. Our research examines the issue of well-posedness, loss of hyperbolicity, and regularization. This final report summarizes our work on (1) computation of deformation and formation of shear bands in granular material; (1) analysis of a gradient theory of granular plasticity; (2) related elastic and viscoelastic systems of PDE which may lose hyperbolicity.... Granular material, Plastic deformation, Hyperbolic equations.

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Document Details

Document Type
Technical Report
Publication Date
Jan 25, 1993
Accession Number
ADA262449

Entities

People

  • E. B. Pitman

Organizations

  • State University of New York at Albany

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Cauchy Problem
  • Computations
  • Constitutive Equations
  • Discontinuities
  • Elastic Materials
  • Elastic Waves
  • Equations
  • Frequency
  • Granular Materials
  • Hyperelastic Materials
  • Laboratory Tests
  • Linear Algebra
  • Materials
  • Plastic Deformation
  • Plastic Properties
  • Strain Rate

Readers

  • Calculus or Mathematical Analysis
  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design