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Structural Engineering and Mechanics
  Volume 58, Number 2, April25 2016, pages 301-326
DOI: https://doi.org/10.12989/sem.2016.58.2.301
 


New optimization method of patch shape to improve the effectiveness of cracked plates repair
Mohamed S. Bouchiba and Boualem Serier

 
Abstract
    An optimization method of patch shape was developed in this study, in order to improve repair of cracked plates. It aimed to minimize three objectives: stress intensity factor, patch volume and shear stresses in the adhesive film. The choice of these objectives ensures improving crack repair, gaining mass and enhancing the adhesion durability between the fractured plate and the composite patch. This was a multi-objective optimization combined with Finite elements calculations to find out the best distribution of patch height with respect to its width. The implementation of the method identified families of optimal shapes with specific geometric features around the crack tip and at the horizontal end of the patch. Considerable mass gain was achieved while improving the repair efficiency and keeping the adhesive shear stress at low levels.
 
Key Words
    patch repair; stress intensity factor; adhesive shear; finite elements method; shape optimization
 
Address
Mohamed S. Bouchiba and Boualem Serier: Department of Mechanical Engineering, University of Sidi Bel Abbes, BP89 cite Arbi Ben M\'Hidi, Sidi Bel Abbes 22 000, Algeria
 

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