Strength under Various Modes of Deformation

Abstract

Breaking stresses and strains have been measured for sheets of a brittle elastic material, a highly crosslinked polyisoprene rubber, under three different modes of deformation: simple tension, pure shear, and equi-biaxial extension. Sharp cracks, about 2 millimeters long, were made in the center of each specimen before testing. The breaking stress for equi-biaxial straining was found to be significantly higher than for uniaxial straining while the breaking strain was about one-half as large. All of the results are in accord with a single value of the fracture energy, about 150 Joules per square meter. Keywords: Crack growth, Elastomers, Equi-biaxial, Fracture energy, Rubber, Tear strength, Tensile strength, Surface tension, Hot strength, Mechanics, Materials.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA222412

Entities

People

  • Alan Neville Gent
  • C. W. Extrand

Organizations

  • University of Akron

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Biological Sciences
  • Chemistry
  • Elastic Materials
  • Engineering
  • Materials
  • Materials Science
  • Measurement
  • Mechanics
  • Military Research
  • Physics
  • Physics Laboratories
  • Strain Rate
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • United States

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  • Materials Science (Mechanical Engineering).
  • Polymer Science and Technology