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

Mohammadi, S.

doi:10.1177/0021998320909535

Cited by 7 publications

(7 citation statements)

References 21 publications

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“…47 The effect of different parameters on the efficiency and durability of a one-sided patch depends on both the thickness of the repaired plate and the thickness and material of the patch. 48…”

Section: The Effect Of the Patch Adhesive And Main Plate Geometry Onmentioning

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 Effect Of the Patch Adhesive And Main Plate Geometry Onmentioning

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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“…Moreover, the influence of patch shape (circular, rectangular, trapezoid and elliptical) for carbon-epoxy and boron-epoxy patches and their mechanical properties on the SIF of the cracked plate was numerically studied (Kaddouri et al, 2008;Sadek et al, 2018;Hosseini-Toudeshky et al, 2013). Additionally, several researchers had previously evaluated the effects of fully bonded (El-Emam et al, 2016Khan and Essaheb, 2017;, 2020, partially bonded (Albedah et al, 2018a, b;Bellali et al, 2021) and welded patches (Abd-Elhady, 2013). Albedah et al (2018a, b) studied the effect of patch length on one-side bonded composite patches for aluminum panels.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of the behavior of rehabilitated aluminum structures using chopped strand mat GFRP composite patches

Althahban,

Nowier,

El-Sagheer

et al. 2024

FEBE

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PurposeThis paper comprehensively addresses the influence of chopped strand mat glass fiber-reinforced polymer (GFRP) patch configurations such as geometry, dimensions, position and the number of layers of patches, whether a single or double patch is used and how well debonding the area under the patch improves the strength of the cracked aluminum plates with different crack lengths.Design/methodology/approachSingle-edge cracked aluminum specimens of 150 mm in length and 50 mm in width were tested using the tensile test. The cracked aluminum specimens were then repaired using GFRP patches with various configurations. A three-dimensional (3D) finite element method (FEM) was adopted to simulate the repaired cracked aluminum plates using composite patches to obtain the stress intensity factor (SIF). The numerical modeling and validation of ABAQUS software and the contour integral method for SIF calculations provide a valuable tool for further investigation and design optimization.FindingsThe width of the GFRP patches affected the efficiency of the rehabilitated cracked aluminum plate. Increasing patch width WP from 5 mm to 15 mm increases the peak load by 9.7 and 17.5%, respectively, if compared with the specimen without the patch. The efficiency of the GFRP patch in reducing the SIF increased as the number of layers increased, i.e. the maximum load was enhanced by 5%.Originality/valueThis study assessed repairing metallic structures using the chopped strand mat GFRP. Furthermore, it demonstrated the superiority of rectangular patches over semicircular ones, along with the benefit of using double patches for out-of-plane bending prevention and it emphasizes the detrimental effect of defects in the bonding area between the patch and the cracked component. This underlines the importance of proper surface preparation and bonding techniques for successful repair.Graphical abstract

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“…In reference 4 it was observed that the square patch has a better performance than other patches. The results obtained in reference 5 show that the effect of different parameters on the efficiency and durability of a one-sided patch depends on both the thickness of the repaired plate and the thickness and material of the patch.…”

Section: Introductionmentioning

confidence: 99%

The effect of disbond on the efficiency and durability of a composite patch repair in mode I and mixed mode considering different patch materials

Mohammadi

2022

Polymers and Polymer Composites

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In this paper, considering different parameters and various patch materials, the effect of disbond on the efficiency and durability of a composite patch repair is investigated in mode I and mixed-mode. One of the most important aspects of the composite patch repair is the bond strength. Repair patch disbond may occur at the patch edges or the crack site. At first, the effect of different parameters such as repair patch material and Young’s modulus and thickness of the adhesive on the efficiency and durability of the patch is investigated. Then, the effect of the disbond site on the stress intensity factor (patch efficiency) and adhesive stress (patch durability) is analyzed in both modes I and II. The results show that disbond at the crack site leads to a further reduction in patch efficiency compared to the patch edge disbond, but when separation occurs at the patch edge, the adhesive stress and the disbond growth rate are higher. Also, when 15% of the patch is separated in the crack site, for the longitudinal and transverse disbond modes, the mean KI is increased by 8 and 4%, respectively, compared to the state without disbond. Thus, the longitudinal disbond mode is more critical.

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

Cited by 7 publications

References 21 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

Experimental and numerical analysis of the behavior of rehabilitated aluminum structures using chopped strand mat GFRP composite patches

The effect of disbond on the efficiency and durability of a composite patch repair in mode I and mixed mode considering different patch materials

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