A PHOTOELASTIC INVESTIGATION ON THE CRACK-ARREST CAPABILITY OF PRETENSIONED STIFFENED PANELS

Dynamic photoelasticity, employing a 16-spark gap Cranz-Schardin camera system, was used for dynamic analysis of propagating cracks in stiffened panels. The method of finite elements was used for a corresponding static analysis. Photoelastic models included 3/8 x 10 x 10-inch Homalite-100 plates with 10- and 25-percent pin-joined and bonded stringers. Static and dynamic strain energy release rates, kinetic energy release rates and stringer load concentration factors were determined in stiffenered panels that were pretensioned and then impacted by a projectile. It was found that the arrest capability of a stiffened panel could be assessed through the kinetic energy release rate concept. Also bonded stiffeners were found to be more effective in arresting a propagating crack than a corresponding pin-joined stiffened panel.

  • Corporate Authors:

    University of Washington, Seattle

    Department of Mechanical Engineering
    Seattle, WA  USA  98105
  • Authors:
    • Wade, B G
    • Kobayashi, A S
  • Publication Date: 1973-10

Media Info

  • Features: References;
  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00050708
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: Tech Rpt #17 Intrm Rpt
  • Contract Numbers: N00014-67A-0103-0018
  • Files: TRIS
  • Created Date: Jan 24 1974 12:00AM