A Procedure for Evaluating Fracture Dynamic Parameters from Crack Velocity Measurements.

Abstract

A combined numerical and experimental procedure for evaluating some of the fracture dynamic parameters which govern the crack run-arrest response in a fracturing plate are discussed. A dynamic finite element code is used to compute the dynamic stress intensity factor and dynamic energy release rate associated with a propagating crack which is driven by the experimentally determined crack velocity. Numerical results generated by the developed procedure are then compared with dynamic stress intensity factors obtained through dynamic photoelastic analyses of fracturing Homalite-100 plates. Two edge-cracked specimens with fixed edge displacement loadings and two wedge-loaded double cantilever beam specimens were considered in this comparative study. Good agreements were obtained between the results obtained by the developed numerical-experimental procedure and dynamic photoelasticity. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1977
Accession Number
ADA041445

Entities

People

  • Albert S. Kobayashi
  • S. Mall

Organizations

  • University of Washington

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • Cantilever Beams
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Dynamic Response
  • Engineering
  • Fast Fractures
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Intensity
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Near Field
  • Stress Intensity Factors
  • Stresses

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).