Numerical analysis of surface cracks repaired with single and double patches of composites

Iváñez, I.; Braun, Matías

doi:10.1177/0021998317722044

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…The results obtained in IváÑez and Braun 27 show that the choice of one- or two-sided patch for surface crack repair depends on both the crack depth and the patch thickness. Localized composite patches improve the intrusion properties of tubes without penalizing the overall part weight.…”

Section: The Patch Effectiveness and Comparing The One- And Two-sidedmentioning

confidence: 99%

A review on composite patch repairs and the most important parameters affecting its efficiency and durability

Mohammadi

Yousefi

Khazaei

2020

Journal of Reinforced Plastics and Composites

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In many industries, when replacement of a part is not possible or economic, the repair is done. One of the best methods for repairing metal and composite parts is using composite patches. Repairing with a composite patch is a widespread field to extend the service life of the cracked components. This technique is more structurally efficient with fewer damages on the structure than others. The bonded patch offers many advantages over a mechanically fastened doubler, which include improved fatigue behavior, reduced corrosion, and easy conformance to complex aerodynamic contours. In this article, advantages of the composite patch and its efficiency and durability are discussed, and the most important parameters (patch and adhesive thickness, patch separation, residual stress, patch length and width, etc.) affecting its performance are studied based on the latest available references.

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Section: The Patch Effectiveness and Comparing The One- And Two-sidedmentioning

confidence: 99%

A review on composite patch repairs and the most important parameters affecting its efficiency and durability

Mohammadi

Yousefi

Khazaei

2020

Journal of Reinforced Plastics and Composites

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show abstract

“…That is because, in higher volume fraction, the patch thickness has more effect on the SIF rather than the patch properties. 4,23 Effect of CNT volume fraction of composite patch on the SIF…”

Section: Effect Of Carbon Fiber Volume Fraction Of Composite Patch Onmentioning

confidence: 99%

Numerical analysis of cracked aluminum plate repaired with multi-scale reinforcement composite patches

Yousefi

Mashhadi

Safarabadi

2020

Journal of Composite Materials

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In this study, numerical modeling is used to investigate the performance of a single-sided composite patch with different scale fillers, as reinforcement of a cracked aluminum plate under static tension. The main concerns of previous studies are about the geometry of patches, composite layups, and failure of adhesive. In this research, the effect of patch properties such as size and fiber volume fraction, the thickness of patch, and thickness of adhesive on the overall performance of the cracked aluminum plate are investigated numerically. Indeed, first, a 3 D representative volume element (RVE) is adopted to calculate the mechanical properties of carbon nanotube (CNT)/epoxy and carbon fiber (CF)/epoxy composite patch at each specified volume fraction for investigating the effect of patch properties on the performance of a single-sided patch for crack repairing. In this regard, the cohesive zone model is adopted to analyze the debonding between the epoxy matrix and reinforcement to characterize the mechanical properties of composite patches. Finally, a linear 3 D finite element analysis is performed to calculate the stress intensity factor (SIF) for cracked aluminum plate repaired by a single-sided composite patch at each specified reinforcement volume fraction for different thickness of patch and different thickness of adhesive. The results demonstrated that the stress intensity factor highly depends on the patch properties (patch stiffness) in addition to patch thickness and adhesive thickness.

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“…The performance of one and two-sided circular patch for surface crack repair was compared through the maximum SIF. 19 The effect of different parameters was investigated and the results show that the choice of one or two-sided patch depends on both the crack depth and the patch thickness. Repaired samples with the hybrid method, composite patch, and bolt clamping exhibited up to 49%, 44%, and 24% increase in tensile strength under pure tensile stress, respectively.…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation of one-sided composite patch efficiency for repairing crack in mixed mode considering different thicknesses of the main plate

Mohammadi

2020

Journal of Composite Materials

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In this paper, parameters affecting the performance and durability of a one-sided composite patch for mixed-mode crack repairing is investigated, considering different thicknesses of the main plate. In different references, there is no unity of opinion on the effect of various parameters on the performance and durability of one-sided patches. In the present study, to eliminate this disagreement, 3D finite element method is employed. It is clear that the effect of each parameter strongly depends on the thickness of the repaired plate. Among the investigated parameters, the patch material, length and width of the patch, and adhesive thickness are more important and studied in this paper. Results reveal that the effect of different parameters on the performance and durability of one-sided patches depends not only on the thickness of the main plate but also on the patch material.

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Numerical analysis of surface cracks repaired with single and double patches of composites

Cited by 11 publications

References 24 publications

A review on composite patch repairs and the most important parameters affecting its efficiency and durability

A review on composite patch repairs and the most important parameters affecting its efficiency and durability

Numerical analysis of cracked aluminum plate repaired with multi-scale reinforcement composite patches

Parametric investigation of one-sided composite patch efficiency for repairing crack in mixed mode considering different thicknesses of the main plate

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