Proposed Standard Arc-Bend Chord-Support Fracture Toughness Specimens and K Expressions

Abstract

Collocation and finite element calculations and limit solutions were used to propose standard geometries and K expressions for measuring fracture toughness with arc-bend chord-support specimens. Polynomial expressions for K were determined for a wide range of crack length and for two span-to-depth ratios. Fracture toughness of steel and aluminum alloys was measured using the proposed methods and compared with results from existing standard methods. Keywords: Fracture toughness, Test methods, Collocation, Cylindrical shape.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA198779

Entities

People

  • John H. Underwood

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum
  • Aluminum Alloys
  • Cracks
  • Engineering
  • Fracture (Mechanics)
  • Geometry
  • Materials
  • Measurement
  • Mechanics
  • Military Research
  • Security
  • Standards
  • Stress Intensity Factors
  • Stresses
  • Test Fixtures
  • Test Methods

Readers

  • Approximation Theory.
  • Materials Science (Mechanical Engineering).