Effect of Welded Stiffeners on Crack Growth Rate

Fatigue crack growth is studied in welded, stiffened panels through the use of analytical, numerical, and experimental means. Full scale testing is conducted by integrating welded, stiffened panels into a box girder configuration subjected to cyclic fatigue loading. Analytical modeling is performed based on superposition of linear elastic fracture mechanics, assuming a worst-case residual stress field representation. Numerical modeling is performed using finite element models, with temperature gradients simulating residual stresses, to calculate the J-Integral around the crack tip at different stages of crack development, and transforming the results into a propagation rate prediction. An initial crack is introduced and crack propagation behavior is observed, noting variations due to interaction with the inherent residual stress field of welded stiffeners. The two modeling techniques are compared in their ability to predict worst-case crack growth rates and correlated with experimental results.

  • Record URL:
  • Corporate Authors:

    University of Minnesota, Twin Cities

    Department of Civil Engineering, 500 Pillsbury Drive, SE
    Minneapolis, MN  United States  55455
  • Authors:
    • Pilarski, Paul
  • Publication Date: 1999-6

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Master's Thesis
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 239p

Subject/Index Terms

Filing Info

  • Accession Number: 01718006
  • Record Type: Publication
  • Files: NTL, TRIS
  • Created Date: Aug 30 2019 8:45AM