A Semiautomated System for Moire Strain Analysis.

Abstract

A method for analyzing Moire fringe photographs without acquiring point by point data manually is described. A computer controlled video digitizer is used to acquire video intensity data for up to 1024 x 1024 pixels per photograph. Software was developed to acquire the data and store it locally to the digitizer's computer. Data reduction and analysis is performed on a host minicomputer. Software for this host was developed to upload all the data, perform error checking and subsequently perform the reduction and analysis. The data analysis is performed using a finite elements global smoothing technique. This method allows the displacements to be input to the analysis and the strains determined. Results may be plotted as contours of strain or slices may be taken at any locations in any direction. Keywords: Strain(Mechanics); Image processing; Computer applications; Fourier analysis; Computer programming.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA181692

Entities

People

  • Alan H. Katz

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Composite Materials
  • Computer Programming
  • Computer Programs
  • Computers
  • Data Processing
  • Data Reduction
  • Engineering
  • Image Processing
  • Images
  • Information Processing
  • Intensity
  • Materials
  • Materials Science
  • Military Research
  • Processing Equipment

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Database Systems and Applications
  • Structural Health Monitoring of Composite Structures.