A Theoretical Investigation into the Inelastic Behavior of Metal-Matrix Composites

Abstract

Various self-consistent analysis have been proposed and used to approximately evaluate the elastic stiffness and elastic-plastic behavior of metal-matrix composites. Such analysis have generally relied on very simple theoretical models for the matrix inelastic stress-strain response. This was perhaps substantiated on the basis of a lack of combined stress state experiments. Weng (1988) successfully approximated the inelastic behavior of spherical particle-reinforced utilizing a modified self-consistent model called the equivalent inclusion-average stress (EIAS) method. Noting the overly stiff response of the basic EIAS model, he developed the 'secant modulus' method to correct for the overconstraining power of the matrix. The purpose of this thesis is to reexamine the problem in the context of more sophisticated nonlinear kinematic hardening rules for the matrix. An EIAS method which incorporates a tangent stiffness formulation based on incremental plasticity is proposed.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1990
Accession Number
ADA223973

Entities

People

  • William F. Ward

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Computer Programs
  • Elastic Properties
  • Fiber Reinforced Composites
  • Geometry
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metal Matrix Composites
  • Micromechanics
  • Modulus Of Elasticity
  • Plastic Properties
  • Shear Modulus
  • Stiffness
  • Stresses

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials