A Numerical Dynamic Fracture Analyses of Three Wedge-Loaded DCB Specimens.

Abstract

A dynamic finite element code is used to compute the dynamic fracture toughness and crack arrest stress intensity factor from experimentally determined crack velocities in three fracturing wedge-loaded double cantilever beam (DCB) specimens. One experiment involving an Aradite-B DCB specimen by Kalthoff, et al., and two experiments involving Homalite-100 DCB specimens by Kobayashi, et al. and Irwin, et al. were analyzed by this hybrid numerical and experimental technique. Despite minor discrepancies, the computed dynamic fracture toughness and crack arrest stress intensity factors were in reasonable agreement with those determined experimentally. This comparative study between different experimental setups also indicates that the apparent differences in fracture dynamic responses could be attributed mainly to the differences in material properties, bluntness of the initial crack and specimen sizes and not to the differences in experimental techniques used. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA046599

Entities

People

  • A. F. Emery
  • Albert S. Kobayashi
  • S. Mall
  • Y. Urabe

Organizations

  • University of Washington

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Cantilever Beams
  • Civil Engineering
  • Crack Propagation
  • Crack Tips
  • Dynamic Response
  • Elastic Properties
  • Engineering
  • Fast Fractures
  • Finite Element Analysis
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Stress Intensity Factors
  • Stress Waves
  • Transient Response Analysis

Readers

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