Accession Number : ADA608123


Title :   Finite Element and Analytical Analysis of Cracks in Thick Stiffened Plates Repaired with a Single Sided Composite Patch


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Hall, Benjamin L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a608123.pdf


Report Date : Jun 2014


Pagination or Media Count : 63


Abstract : The purpose of this thesis was to investigate crack growth behavior in thick stiffened aluminum plates repaired with a single-sided composite patch. A model was developed using finite element analysis that extracted the mode I strain energy release rate (SERR) with use of the Virtual Crack Closure Technique. The dimensions and spacing of the stiffeners were varied to determine their effect on reducing the SERR. This model was also compared to an unstiffened model and one without a composite patch. A tensile load and a bending moment were both applied to the model for various configurations. These results were then used to develop an analytical model that can be used to predict the effectiveness of a patched surface.


Descriptors :   *CRACK PROPAGATION , *FINITE ELEMENT ANALYSIS , ALUMINUM , BENDING MOMENTS , CONFIGURATIONS , EXTRACTION , FLEXIBLE STRUCTURES , MATHEMATICAL MODELS , METAL PLATES , MODELS , PLATES , STIFFENING , STIFFNESS , SURFACES , TENSILE PROPERTIES , THESES


Subject Categories : Statistics and Probability
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE