Fracture in a Tensile Specimen

Abstract

There appears to have been little attempt to study the stress or strain conditions under which internal fracture starts and/or propagates in the neck of a tensile specimen. Using a continuous ultrasonic 'searching' technique, this 'incipient' internal fracturing has been investigated in a variety of low strength ductile metals (copper and steel). Voids of approximately 0.001 inch in size have been signalled ultrasonically and confirmed metallographically. This paper is centered around the evaluation of crack propagation with emphasis on void formation and coalescence and interpretation in terms of a non-adiabatic shear separation process.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1966
Accession Number
AD0787427

Entities

People

  • Joseph I. Bluhm
  • Robert J. Morrissey

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Applied Mechanics
  • Crack Propagation
  • Crack Tips
  • Flow
  • Materials
  • Mechanical Properties
  • Mechanics
  • Radial Stress
  • Reduction Of Area
  • Shear Bands
  • Steel
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Tensile Testers
  • Tensile Testing
  • Yield Strength

Fields of Study

  • Materials science

Readers

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