Impacted Notch Bend Specimen.

Abstract

The proposed method for testing and evaluating data generated by instrumented impact testings of notch bend specimens is evaluated by the experimental and numerical dynamic fracture results obtained in the past. As expected, brittle fracture of the photoelastic, steel and aluminum impacted notch specimens considered in this paper cannot be predicted by the static stress intensity factors at the instant of crack propagation. The fracture energy was only a fraction of the total absorbed energy and was equally unsuitable for dynamic fracture characterization of these specimens. This critical evaluation of the proposed method suggests that despite the enormous correlation studies which justify the use of static analysis, neither the proposed method nor the resultant static stress intensity factor should be used to evaluate the fracture data of impacted notch bend specimens of slightly different configurations. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA097131

Entities

People

  • Albert S. Kobayashi
  • M. Ramulu
  • S. Mall

Organizations

  • University of Washington

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • California
  • Contracts
  • Crack Propagation
  • Elements
  • Engineering
  • Finite Element Analysis
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Microsecond Time
  • Numerical Analysis
  • Photoelasticity
  • Strain Gages
  • Stress Intensity Factors
  • Test And Evaluation
  • Transient Response Analysis
  • United States

Fields of Study

  • Engineering

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Systems Analysis and Design