DIRECT DETERMINATION OF FLEXURAL STRAINS IN PLATES USING PROJECTED GRATINGS

It is proposed in this paper to use projected gratings to determine principal strains in plates subjected to bending. The method requires the rotation of one photograph of the deformed grating over a copy of itself, the rotation taking place about the point at which the bending strains are desired. The idea previously suggested by Stetson to double differentiate holograms of bent plates has been extended and verified with an application to a plate subjected to twisting. The proposed method is easy to use and permits the determination of principal strains in plates subjected to much larger deflections than the ones that can be studied using holograms. Suggestions to improve the precision of the determination are also made.

  • Corporate Authors:

    Oakland University

    School of Engineering
    Rochester, MI  USA  48063
  • Authors:
    • Liang, C Y
    • Hung, Y Y
    • Durelli, A J
    • Hovanesian, J D
  • Publication Date: 1977-6

Media Info

  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00159527
  • Record Type: Publication
  • Source Agency: Office of Naval Research London (England)
  • Report/Paper Numbers: No. 45
  • Contract Numbers: N00014-76-C-0487
  • Files: TRIS
  • Created Date: Aug 31 1977 12:00AM