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Optimization of composite patch repair for inclined crack on aluminum plate using genetic algorithm

Talebi, B ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. Publisher: International Council of the Aeronautical Sciences , 2016
  3. Abstract:
  4. In this study, a composite patch repair will be designed for an aluminum plate with a central crack placed at 45 degrees to the applied unidirectional tensile load carried by the plate. In this state, the condition of loading is mixed mode. In the first step, behavior of the crack repaired by the composite patch under the applied tensile load is simulated by using ABAQUS commercial software. The crack growth process is modeled with the extended finite element method (XFEM) and the cohesive zone model (CZM) is used to model any damage progression in the adhesive of the composite patch repair. The shape of the five layer composite patch is assumed to be elliptical. For design optimization, the size of major and minor radius of the ellipse and the angle between the major axis and horizon are considered as design parameters. Then, using the genetic algorithm (GA), these design parameters will be found such that the weight of composite patch is minimum in presence of some constraints like load sustainability and maximum stress in the patch
  5. Keywords:
  6. Composite patch repair ; Crack growth ; CZM ; ABAQUS ; Aluminum ; Aluminum plating ; Crack propagation ; Cracks ; Genetic algorithms ; Optimization ; Repair ; Stress intensity factors ; Tensile stress ; Cohesive zone model ; Commercial software ; Composite patch repairs ; Crack growth process ; Design optimization ; Extended finite element method ; Inclined crack ; XFEM ; Finite element method
  7. Source: 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016, 25 September 2016 through 30 September 2016 ; 2016 ; 9783932182853 (ISBN)
  8. URL: http://www.icas.org/ICAS_ARCHIVE/ICAS2016/data/preview/2016_0500.htm