Experimental Evaluation of the Taylor-Type Polycrystal Model for the Finite Deformation of an FCC Metal (OFHC Copper)

Abstract

Large deformation uniaxial compression and fixed-end torsion (simple shear) experiments were conducted on annealed OFHC Copper to obtain its stress- strain behavior. This material behavior was also predicted using the Taylor-type rate dependent polycrystal model by Asaro and Needleman. Simulations of the experiments were conducted in personal computers, using a recently developed, highly efficient, fully implicit, time integration scheme by Kalidindi et al. In the initial phase of the simulation, the evolution of the constituent single crystal slip system deformation resistance was estimated using the experimentally determined compressive stress-strain behavior of the polycrystal. With this crystal constituent behavior, the stress-strain behavior of the polycrystal for simple shear was computed.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1991
Accession Number
ADA238695

Entities

People

  • Ronald A. Swanson
  • Tusit Weerasooriya

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computer Programs
  • Computers
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Experimental Data
  • Materials
  • Materials Science
  • Mechanical Engineering
  • Mechanics
  • Military Research
  • Polycrystals
  • Simulations
  • Single Crystals
  • Strain Rate
  • Stress Strain Relations

Readers

  • Computational Fluid Dynamics (CFD)
  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.