X-Ray Diffraction and Finite Element Study of Residual Stress Effects on Fatigue Crack Growth.

Abstract

The combined techniques of microbeam x-ray diffraction and Finite Element (FE) analysis have been used to analyze the residual stresses resulting from an interference operation in 1080 steel. Both techniques showed the resulting stresses to be tensile, and accelerated growth rates were observed in fatigue cracks subsequently grown into this residual stress field. The growth rates also showed a clear sensitivity to applied stress intensity level. Through thickness residual stress variations as predicted by FE analysis help explain observed crack front shapes.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1997
Accession Number
ADA326227

Entities

People

  • J. D. Almer
  • Jerome B. Cohen
  • K. R. Mccallum
  • R. A. Winholtz

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Civil Engineering
  • Engineering
  • Finite Element Analysis
  • Geometry
  • Grain Size
  • Intensity
  • Materials
  • Materials Science
  • Microbeams
  • Residual Stress
  • Sensitivity
  • Stress Analysis
  • Structural Analysis
  • Tensile Stress
  • Thickness
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.
  • Structural Dynamics.