A Generalized Least-Squares Determination of Triaxial Stress States by X-Ray Diffraction and the Associated Errors.

Abstract

The determination of residual stresses via x-ray diffraction is briefly reviewed, with particular emphasis on the triaxial stress state. A new method is proposed for determining the general stress tensor, which considerably reduces the variances of the stresses due to counting statistics and gradients. The procedure involves a generalized least square solution of strains measured at vario us tilts of the x ray beam to the sampled and a set of tilts not heretofore used is recommended to minimize these errors.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA183851

Entities

People

  • Jerome B. Cohen
  • R. A. Winholtz

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computer Simulations
  • Computers
  • Coordinate Systems
  • Diffraction
  • Least Squares Method
  • Materials
  • Materials Science
  • Physical Properties
  • Residual Stress
  • Residuals
  • Shear Stresses
  • Simulations
  • Statistics
  • Stresses
  • Triaxial Stresses
  • X Rays
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Regression Analysis.
  • Structural Health Monitoring of Composite Structures.