Stress Intensity Magnification for Deep Surface Cracks in Sheets and Plates.

Abstract

The Irwin stress intensity factor for surface cracks with crack depths less than half the plate thickness is extended to cases of relatively deep cracks by including the effect of the free surface opposite the crack. The stress intensity magnification factor is given as a function of applied load, crack length, crack depth, sheet thickness, yield strength, and Poisson's ratio. The combinations of these variables for which the plastic zone extends completely through the thickness are also predicted. The range of applicability of the analysis to surface-crack specimen data was investigated in terms of crack-depth-to-specimen-thickness ratio and crack depth-to-length ratio.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1970
Accession Number
ADA309661

Entities

People

  • Arthur G. Holms
  • Robert B. Anderson
  • Thomas W. Orange

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Alloys
  • Crack Tips
  • Equations
  • Geometry
  • Liquid Hydrogen
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Properties
  • Stress Intensity Factors
  • Stresses
  • Tensile Strength
  • Tensile Stress
  • Three Dimensional
  • Titanium Alloys
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).