Using CZM and XFEM to predict the damage to aluminum notched plates reinforced with a composite patch

Bellali, Mohammed Amine; Mokhtari, Mohamed; Benzaama, Habib; Fekirini, Hamida; Sérier, B.; Madani, K.

doi:10.2140/jomms.2020.15.185

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…Bonded systems are presented as a composite material where the adhesive is the weakest element that conditions the response and resistance of the system. The behaviour and strength parameters of adhesives, as shown by many researchers, are what condition the strength of bonded assemblies, such as the work presented by Badr et al [1] and that of Blaili et al [2,3]. Other authors were also Nunes et al [4] who compared the tensile strength for three qualities of the adhesive, the strong and brittle Araldite AV138, the less strong but ductile Araldite 2015, the high strength and ductility Sikaforce ® 7888.…”

Section: Introductionmentioning

confidence: 99%

Predicting Damage in Single-Lap Composite Joints with Nonlinear CZM behaviour using FGM Concept in Fibre-Matrix Coupling Laws

Messabih,

Mokhtari,

Bentoumi

et al. 2023

Preprint

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This work represents a novel and innovative numerical approach, which involves validating the results against experimental data to ensure reliability. This study focuses on incorporating the volume fraction of the FGM concept into the fibre-matrix mixing laws of unidirectional composites. Notably, a nonlinear formulation has been employed to account for the adhesive's ductility, and the CZM model has been integrated into the finite element analysis using the ABAQUS code. The CZM model in this study incorporates both shear and detachment modes, characterized by increasing adhesive stress in a trapezoidal shape. The proposed approaches introduce fibre presence in the matrix per layer, with concepts like C-1 having denser fibres in the middle of the thickness and others like C-2 and C-3 closer to the plate end. These concepts are designed to mitigate the transmission of loads to the adhesive joint and explore their influence on different responses and damage levels through adhesive plasticization. Additionally, due to the attached plates, the stiffness of the system significantly affects the overall response and resistance under mixed loading conditions.

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Section: Introductionmentioning

confidence: 99%

Predicting Damage in Single-Lap Composite Joints with Nonlinear CZM behaviour using FGM Concept in Fibre-Matrix Coupling Laws

Messabih,

Mokhtari,

Bentoumi

et al. 2023

Preprint

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“…They show that as adhesive thickness increases, the damaged area of the adhesive joint increases and conversely, as the thickness of the structure is thin, adhesive damage becomes more severe. Bellali et al [23], using the CZM cohesive zone approach and the extended finite element method, analyzed, in terms of debonding resistance, the damage of composite patch repair of aircraft structures. They show that this resistance is closely related to the stacking sequences of the patch and the size of the repaired defect.…”

Section: Introductionmentioning

confidence: 99%

XFEM and CZM modeling to predict the repair damage by composite patch of aircraft structures: Debonding parameters

Bellali

Sérier

Mokhtari

et al. 2021

Composite Structures

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In this work, a model based on the combination of two approaches XFEM and CZM, has been used to predict the damage of repairs by composite patch (patch/adhesive/plate assembly). This degradation is analyzed in terms of adhesive damage considering both initiation and propagation of interfacial debonding. The interfacial cohesive zone of the patch/adhesive/plate system is defined by its cohesive properties and its resistance to debonding estimated from the displacement-load curves.This study highlights, as a function of the adhesive properties of the plate/patch interface, the competition between two degradation mechanisms: adhesive damage (through a mechanism of initiation and propagation of patch debonding from the plate) and plate damage (through a phenomenon of crack initiation and propagation emanating from notch). It also highlights, depending on the nature of the interface, four physical parameters: the bending deflection of the repaired plate, the displacement path of the patch-reinforced plate, the debonding resistance and the interfacial shear stresses, characteristic of the adhesive joint damage and their interactions with the interface. This is the originality of this study. Results show that XFEM simulations based on the CZM model allow adequate prediction of the damage of the patch/adhesive/plate assemblies.

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“…In recent years, Naboulsi and Mall [18] have modeled the adhesive as a third material to allow the actual characteristics to be introduced into numerical modeling. Recently, with the development of computer resources and the appearance of finite element computation code, new methods have been proposed to analyze the failure of adhesive/plate or adhesive/patch interfaces such as the VCCT, XFEM, ZCM methods [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the effect of modifying the thickness of a damaged and repaired plate by composite patch on the J-Integral; effect of bonding defects

Kaddouri¹,

Madani²,

Rezgani

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The composite patch bonding technique in the damaged area has demonstrated its effectiveness in reducing stresses at the stress concentration zones and has ensured a long service life of the repaired structure. The search for a suitable adhesive and patch for good load transfer has led researchers to develop, by mechanical tests, analytical or numerical methods, ideas about the shape, nature, stacking sequence type of adhesive for a better combination of patch and adhesive. Our work fits into this context; the aim is to provide a method to reduce the stresses on the plate by protecting the adhesive against the effect of aging, which significantly affects the mechanical properties of the adhesive and the composite patch. Several factors have been highlighted namely, the effect of the composite stacking sequence, modification of the thickness of the plate, the presence of bonding defects in different positions. The analysis of the J-Integral and the stresses in the adhesive and the patch shows clearly that their values depend strongly on these different parameters. However, the modification made to the plate has no effect on the stress concentration.

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Using CZM and XFEM to predict the damage to aluminum notched plates reinforced with a composite patch

Cited by 12 publications

References 9 publications

Predicting Damage in Single-Lap Composite Joints with Nonlinear CZM behaviour using FGM Concept in Fibre-Matrix Coupling Laws

Predicting Damage in Single-Lap Composite Joints with Nonlinear CZM behaviour using FGM Concept in Fibre-Matrix Coupling Laws

XFEM and CZM modeling to predict the repair damage by composite patch of aircraft structures: Debonding parameters

Analysis of the effect of modifying the thickness of a damaged and repaired plate by composite patch on the J-Integral; effect of bonding defects

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