The Characterization of Boron/Aluminum Composite as an Orthotropic Elastic-Plastic Material

Abstract

Preliminary testing showed that Boron/aluminum displayed nearly linear elastic behavior up to failure when stressed in the fiber direction, but proved to be quite ductile in off-axis tests. Further, fatigue cracks could not be grown through the fibers but would always propagate parallel to the fibers irrespective of the initial orientation of the crack. An in-depth study of the room temperature tensile behavior of boron/aluminum composite was conducted. This behavior was accurately described using an orthotropic elastic-plastic constitutive model. An investigation into the crack-tip plastic zones in boron/aluminum was conducted both experimentally and analytically, and the results help explain the fatigue growth pattern.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1985
Accession Number
ADA256742

Entities

People

  • Chintech Sun
  • D. Kenaga
  • J. F. Doyle

Organizations

  • Purdue University

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Composite Materials
  • Crack Tips
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Metal Matrix Composites
  • Modulus Of Elasticity
  • Plastic Properties
  • Shear Modulus
  • Strain Gages
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.