Numerical analysis of the stress intensity factors for repaired cracks from a notch with bonded composite semicircular patch

Ouinas, Djamel; Hebbar, Ahmed; Bouiadjra, B. Bachir; Belhouari, M.; Sérier, B.

doi:10.1016/j.compositesb.2009.06.002

Cited by 30 publications

(17 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

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

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…4 Generally, thin panels were analyzed by using 2-D models, [5][6][7][8][9][10][11][12][13] whereas thick panels were done as a 3-D problem. [14][15][16][17][18][19][20][21][22][23][24] With thin panels, Naboulsi and Mall 5 proposed a 2-D model for the analysis of adhesive layer, composite patch and thin notched substrate panel. Sun and Klug 6 developed an effective spring model of adhesive layer from the Mindlin plate theory.…”

Section: Introductionmentioning

confidence: 99%

Material parameter modeling and solution technique using birth–death element for notched metallic panel repaired with bonded composite patch

Tong

Shi-qiu

Xiong

2014

Chinese Journal of Aeronautics

View full text Add to dashboard Cite

This paper seeks to outline a novel three-layer model and a new birth-death element solution technique to evaluate static strength of notched metallic panel repaired with bonded composite patch and to optimize material parameters. The higher order 3D, 8-node isotropic solid element and 8-node anisotropic layered solid element with three degrees of freedom per node are respectively implemented to model substrate panel, adhesive layer and composite patch to establish three-layer model of repaired panel. The new solving technique based on birth-death element is developed to allow solution of the stress pattern of repaired panel for identifying failure mode. The new model and its solution are used to model failure mode and residual strength of repaired panel, and the obtained results have a good agreement with the experimental findings. Finally, the influences of material parameter of adhesive layer and composite patch on the residual strength of repaired panel are investigated for optimizing material properties to meet operational and environmental constraints.

show abstract

“…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%

“…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

View full text Add to dashboard Cite

Numerical analysis of the stress intensity factors for repaired cracks from a notch with bonded composite semicircular patch

Cited by 30 publications

References 18 publications

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

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

Material parameter modeling and solution technique using birth–death element for notched metallic panel repaired with bonded composite patch

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

Contact Info

Product

Resources

About