Modeling Plastic Shocks in Periodic Laminates with Gradient Plasticity Theories

Abstract

Steady plastic shocks generated by planar impact on metal-polymer laminate composites, are analyzed in the framework of gradient plasticity theories. The laminate material has a periodic structure with unit cell composed of two layers of different materials. First and second order gradient plasticity theories are used to model the structure of steady plastic shocks. In both theories, the effect of the internal structure is accounted for at the microscopic level by two material parameters depending upon the layer's thickness and the properties of constituents. Those two structure-parameters are shown to be uniquely determined from experimental data.

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Document Details

Document Type
Technical Report
Publication Date
Aug 26, 2007
Accession Number
ADA482353

Entities

People

  • A. Molinari
  • G. Ravichandran

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cell Size
  • Composite Materials
  • Continuum Mechanics
  • Elastic Properties
  • Engineering
  • Equations
  • Experimental Data
  • Laminates
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Numerical Analysis
  • Plastic Deformation
  • Plastic Properties
  • Shock Waves
  • Strain Rate

Readers

  • Fluid Dynamics.
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.