Modeling the Effects of Hole Distribution in Perforated Aluminum Sheets I: Representative Unit Cells

Abstract

A method is presented that incorporates micro structural information into a model of the mechanical behavior of two-phase composite materials. The approach is to determine periodic microstructures that are statistically similar to the actual microstructure of the material under consideration. The utility of this method is that computationally tractable finite element simulations can then be carried out on representative unit cells that are directly obtained from microstructural observations. To illustrate this method, mechanical tests are performed on perforated aluminum sheets with various microstructures, and the results are compared to finite element simulations of selected representative unit cells. The simulations agree with the trends observed in the experiments, including measurements of the overall strength and ductility of the sheets. Advantages and limitations of the approach used here are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Sep 12, 2000
Accession Number
ADA383139

Entities

People

  • G. L. Povirk
  • Gary F. Raiser
  • S. Jia

Organizations

  • Yale University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Boundary Value Problems
  • Ceramic Matrix Composites
  • Composite Materials
  • Data Acquisition
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Microstructure
  • Modulus Of Elasticity
  • Spatial Distribution
  • Strain Hardening
  • Stress Strain Relations
  • Stresses
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Materials Science (Mechanical Engineering).