Experimental Determination of the Dependence of Crack Extension Force on Crack Length for a Single-Edge-Notch Tension Specimen

Abstract

The single-edge-notch form of a plane-strain (or opening mode) crack toughness specimen is particularly economical in regard to available test material and testing machine capacity. The necessary calibration relation for a particular design of a single-edge-notch specimen centrally loaded in tension, was determined from a series of compliance measurements at crack lengths ranging from zero to one-half the specimen width. The accuracy of the calibration is estimated to be +1/2 percent in the range of interest. Agreement with concurrent results obtained by boundary collocation of an appropriate stress function is excellent. Alternative types of specimen are discussed, and the relation between necessary specimen size and the ratio of toughness to yield strength is emphasized.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1964
Accession Number
ADA397708

Entities

People

  • Bernard Gross
  • John E. Srawley
  • Melvin H. Jones

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Boundaries
  • Calibration
  • Computer Programs
  • Cracks
  • Detection
  • Elastic Properties
  • Engineering
  • Materials
  • Mathematical Analysis
  • Measurement
  • Modulus Of Elasticity
  • Stress Analysis
  • Stress Intensity Factors
  • Stresses
  • Two Dimensional
  • Yield Strength

Readers

  • Approximation Theory.
  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design