Characterization of Deformation and Failure of Stainless Steel Welds

Abstract

Kolsky bar experiments have been used to determine the high-strain-rate response of AL6XN welds - including the base material, the heat-affected zone, and the weld. A finite element model for analyzing ductile fracture near the weld as been developed and implemented as a material routine VUMAT in ABAQUS/Explicit. The FE model involves a Gurson-type constitutive description for porous materials, combined with a microstructural length scale and an upper pound approach for modeling the onset and evolution of void coalescence. This model appears to provide a promising description of dynamic failure of butt-welded stainless steel plates. In a second investigation, pressure-shear plate impact experiments have been used to determine the shearing resistance of an epoxy and two vinyl esters at strain rates of 100,000/sec. This shearing resistance has been shown to increase significantly with increasing pressure.

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Document Details

Document Type
Technical Report
Publication Date
Feb 17, 2006
Accession Number
ADA443351

Entities

People

  • Rodney J. Clifton

Organizations

  • Brown University

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Coalescence
  • Composite Materials
  • Elastic Waves
  • Elements
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Materials
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Porous Materials
  • Resistance
  • Stainless Steel
  • Steel
  • Strain Rate
  • Subatomic Particles
  • X Rays

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Mechanical Engineering/Mechanics of Materials.
  • Metallurgy