The Influence of Small Defects on Tensile Specimen Ductility and Symmetry of Deformation.

Abstract

The quantitative translation of physical weld quality into structural integrity prediction depends on accurate characterization of weld material behavior in the presence of fabrication defects. The presence of such defects will, however significantly influence the response of common material test specimens. If the influence of such defects is fully understood, test specimen data may be interpreted in a more meaningful way. The role of a physically relevant geometric imperfection, in the form of a spherical void defect, on cylindrical tensile specimen response is computationally simulated for HY-100 weld metal. Defect radius and location along the specimen axis are treated as independent parameters. Asymmetry of specimen deformation (in terms of specimen neck location) and specimen ductility (in terms of the reduction of area at failure) are computationally predicted. Keywords: Weld metal, Tensile necking, Void defect, Energy density, Tensile specimen, Fracture toughness.

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Document Details

Document Type
Technical Report
Publication Date
Sep 04, 1987
Accession Number
ADA187983

Entities

People

  • Mitchell I. Jolles
  • Peter Matic

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Asymmetry
  • Boundaries
  • Classification
  • Ductility
  • Elements
  • Engineering
  • Fabrication
  • Geometry
  • Materials
  • Materials Processing
  • Mechanics
  • Metals
  • Reduction Of Area
  • Security
  • Structural Integrity
  • Symmetry
  • Weld Metal

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Trauma Surgery or Emergency Medicine.