Determination of Constitutive Equations for High Strength Aluminum and Titanium Alloys Applicable to Sheet Metal Formability

Abstract

The formability of sheet metal can be investigated by the calculation of a forming limit curve (FLC) which gives the locus of principal strains beyond which failure is expected. For failure by plastic instability, the FLC depends upon material formability indices including the strain hardening coefficient and strain rate sensitivity. If a yield surface can be assumed, the material parameters needed to calculate the FLC can be obtained from uniaxial tensile data. This approach has been adopted to investigate the formability of certain high strength aerospace sheet alloys.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1979
Accession Number
ADA072121

Entities

People

  • Joseph F. Thomas Jr.

Organizations

  • Wright State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Constitutive Equations
  • Contracts
  • Data Acquisition
  • Engineering
  • Failure Mode And Effect Analysis
  • Materials
  • Materials Laboratories
  • Sheet Metal
  • Strain Hardening
  • Stress Strain Relations
  • Stresses
  • Tensile Properties
  • Tensile Strain
  • Titanium Alloys
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design

Technology Areas

  • Space