Towards optimization of patch shape on the performance of bonded composite repair using FEM

Ramji, M.; Srilakshmi, R; Prakash, Madappa

doi:10.1016/j.compositesb.2012.07.049

Cited by 101 publications

(86 citation statements)

References 10 publications

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“…It was proved that "H" and arrow shapes of the patch performance were better than rectangular patch. Ramji et al [9] worked on 3-D finite element analysis of composite patch shape to optimize the design and applied on an inclined center cracked panel, repaired by symmetrical patch. Also SIF reduction was compared for the same volume of patch.…”

Section: Introductionmentioning

confidence: 99%

Energy absorption of repaired composite laminates subjected to impact loading

Balaganesan

Khan

2016

Composites Part B: Engineering

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Section: Introductionmentioning

confidence: 99%

Energy absorption of repaired composite laminates subjected to impact loading

Balaganesan

Khan

2016

Composites Part B: Engineering

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“…Ramji and Srilakshmi [9], by analysing the repair of the structure solicited in mixed mode with composite patch, have shown that the SIF in repairing crack is insensitive to the patch shapes. In another study, Ramji and al [10], studying the effect of the circular, square, rectangular, elliptical and octagonal shapes of the patch on the crack repair efficiency in mixed mode, they concluded that, the rectangular and octagonal shapes are the performances, in terms of the SIF reducing. Kashfuddoja and all.…”

Section: Introductionmentioning

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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“…Breitzman et al 28 conducted optimization design on the thickness and stacking sequence of composite repair patch under tensile loading by checking von Mises stress pattern. Ramji et al 29 performed geometry optimization of notched panel repaired with bonded symmetrical composite patches with circle, rectangle, square, ellipse, octagon and expanded octagon shapes based on 3-D FEA.…”

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

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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.

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Towards optimization of patch shape on the performance of bonded composite repair using FEM

Cited by 101 publications

References 10 publications

Energy absorption of repaired composite laminates subjected to impact loading

Energy absorption of repaired composite laminates subjected to impact loading

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

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