Moire for Dynamic Fracture.

Abstract

Moire' interferometry was used to record the displacement field surrounding a rapidly propagating crack in thin aluminum fracture specimens. The J- and T(sub epsilon)(*)-integral values were computed directly, for the first time, from the displacement data. J, T(epsilon)(*) and CTOA values were also obtained by dynamic, elastic-plastic finite element simulations of the fracture tests. While the near-field J precipitously dropped to zero, the near-field T(epsilon)(*) and CTOA reached a steady state value with crack extension and were found to be a suitable fracture parameter for characterizing rapid crack growth and arrest.

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Document Details

Document Type
Technical Report
Publication Date
Aug 28, 1997
Accession Number
ADA328833

Entities

People

  • Albert S. Kobayashi

Organizations

  • University of Washington

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Applied Mechanics
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Displacement
  • Engineering
  • Fracture (Mechanics)
  • J Integrals
  • Materials
  • Materials Science
  • Mechanical Engineering
  • Mechanics
  • Near Field
  • Numerical Analysis
  • Universities

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).