FE analysis of the behaviour of octagonal bonded composite repair in aircraft structures

Kaddouri, K.; Ouinas, Djamel; Bouiadjra, B. Bachir

doi:10.1016/j.commatsci.2008.03.003

Cited by 22 publications

(13 citation statements)

References 3 publications

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“…This is because the patch carries the loads as the crack grows. Several investigators announced this tendency 6,11,20,22 . It can also noted, according to the results of Figure 3 that the semi-circular shape of patch presents lower values of the stress intensity factor at the crack tip.…”

Section: Computation Of the Stress Intensity Factormentioning

confidence: 99%

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Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures

2014

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Section: Computation Of the Stress Intensity Factormentioning

confidence: 99%

“…Heller and Kaye 19 used the genetic algorithm to optimize the patch shape. Kaddouri et al 20 , Ouinas et al 21,22 analyzed numerically the performance of the octagonal, circular and elliptical shapes of the patches. They showed that the patch shape has a significant effect on the value of the stress intensity factor at the crack tip.…”

Section: Introductionmentioning

confidence: 99%

Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures

2014

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“…In other words, with modification of the patch surface and its thickness (Fig.10). Several works [4,5,13,[19][20][21][22] have focused on the analysis of the patch shapes effect on the quality of the repair in terms of stress intensity factor reduction. These shapes have been optimised to reduce two parameters, the mechanical energy, highly concentrated in crack head (energy gain) and the composite patch mass (mass gain).…”

Section: Patch With a Variation Of The Surface And Conservation Of Itmentioning

confidence: 99%

“…13,15 and 17), this is the originality of this work, virtually no studies have focused on analysing of the repair performance in terms of reducing of all shear stresses in the adhesive layer. Most numerical analytical works have analysed the effectiveness of repair from a point of view, a reduction of fracture energy [4,5,13,[19][20][21][22].…”

Section: Effect Of the Patch Shapes On The Shear Stresses Level In Thmentioning

confidence: 99%

Modeling of a cracked and repaired Al 2024T3 aircraft plate: effect of the composite patch shape on the repair performance

Baghdadi

Sérier

Salem

et al. 2019

Frattura Ed Integrità Strutturale

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In this work the finite element method was used to analyse the composite patch shape effect of the repair performance. Unlike all the works done conducted so far in this domain, this work proposed here, takes into account the reducing both, the stress intensity factor in repairing crack heads and the maximum shear stresses in the adhesive layer. This is the originality of this work. In function of the surface and the volume of the rectangular patch, three cases were taken into consideration: with conservation of the patches surface and its volume, with a reduction of the patches surface and its volumes, and in the end, with a reduction of the patches surface and conservation of its volume. The obtained results show that in the first case, the patch shape have no effect on the SIF, the sharp edges (obtuse, right and acute) of oblique shapes generate high shear stresses, in the second case, the reduced surfaces lead to significant mass gain with the same SIF values. and to an increase in the maximum shear stresses, in the latter case the patches shapes lead to a reduction of the SIF and the shear stresses.

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“…Compared with traditional means of joiningsuch as rivet joints and welded joints -adhesive joints have a more uniform distribution of load, fewer sources of stress concentration, a lighter weight and a lower cost (Ribeiro et al 2011). Because of these advantages, adhesive joints have emerged as one of the primary methods of joining in the automotive, aerospace (Kaddouri et al 2008) and marine industries (Grammond et al 2014). For example, adhesive technology can be used to repair a corroded deck floor and bond the ship body to the deck (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Research on the shear stress of single-lap joints using a variational method

Duan

Dai

2016

Journal of Marine Engineering & Technology

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A great amount of research has been conducted on adhesive joints as they are widely used in industry. In this study, in order to simplify the calculations and obtain more accurate results for the potential energy of adhesive joints, a variational method was used to investigate the stress distribution of adhesive single-lap joints with variable geometrical characteristics and material properties. A two-dimensional finite-element model, Volkersen method and experiments were used to validate the presented model. It was found that if the overlap length is long enough, increasing the length does not reduce the maximum shear stress. It was also found that the maximum shear stress occurs at the loaded side of the thinner plate when the material is the same, and occurs at the loaded side of the plate with the smaller elastic modulus when the two plates have the same thickness. ARTICLE HISTORY

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FE analysis of the behaviour of octagonal bonded composite repair in aircraft structures

Cited by 22 publications

References 3 publications

Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures

Elliptical and circular bonded composite repair under mechanical and thermal loading in aircraft structures

Modeling of a cracked and repaired Al 2024T3 aircraft plate: effect of the composite patch shape on the repair performance

Research on the shear stress of single-lap joints using a variational method

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