Theoretical and numerical investigation of mode‐I delamination of composite double‐cantilever beam with partially reinforced arms

Pan, X. Q.; Jiang, Yi; Li, Mingjun; Su, Zichao

doi:10.1111/ffe.13577

Cited by 3 publications

(3 citation statements)

References 39 publications

(47 reference statements)

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“…The fracture mechanism within high-performance composite laminates is notably intricate, encompassing not just delamination but also various interlaminar damage mechanisms (Krueger, 2015). To enhance predictive capabilities, itis essential to develop failure analysis tools for these distinct failure modes (Azouaoui and Boumediene, 2017;Kenane and Benzeggagh, 1997;Pan et al, 2021). This study presents a numerical and analytical prediction of delamination of a repaired joint due to a defect in the composite subjected to tensile loading.…”

Section: Introductionmentioning

confidence: 99%

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

Talbi,

Salem,

Mechab

et al. 2024

IJSI

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PurposeThis study provides an analysis of patch repair for cracked aircraft structures. Delamination is a type of damage that affects the patch's behavior. The purpose of this study is to assess the influence of delamination on repair performance.Design/methodology/approachAn analytical and numerical study using the finite element method was conducted for a cracked plate repaired with a patch containing a pre-existing delamination defect. The method for defining the contact pair surfaces and modeling the delamination interaction within the patch interface is specified using the virtual crack closure technique (VCCT) approach.FindingsThe efficiency of the repair is measured in terms of the J-integral. The effects of delamination initiation, mechanical loading, crack length and patch stacking sequences are presented. It is noted that in mode I, delamination propagation is only significant at node A. The numerical results are in good agreement with those of the analytical solution found in the literature. It is observed that the patch's behavior is strongly dependent on loading, crack size and stacking sequences in terms of reducing the structure's lifespan, especially in the presence of delamination.Originality/valueThe numerical modeling presented by the VCCT approach is highly valuable for studying delamination evolution. The influence of loading, crack size and stacking sequences on repair performance is discussed in this work.

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Section: Introductionmentioning

confidence: 99%

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

Talbi,

Salem,

Mechab

et al. 2024

IJSI

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“…In addition, the effect of thermal cycle fatigue on the curvature and residual stresses of nanocomposite laminates was investigated by Tabatabaeian and Ghasemi. [7] One of the major problems with composite materials is deboning between their constituents namely delamination which has led to much research devoted to the study of this phenomenon in composites [8][9][10][11][12][13][14] . Such a failure stems from the propagation of preexisting cracks or the formation of new cracks along with the material interfaces.…”

Section: Introductionmentioning

confidence: 99%

Critical strain energy release rate of woven carbon/epoxy composites subjected to thermal cyclic loading

2022

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In the current study, experimental and numerical approaches were adopted to investigate the effect of thermal cyclic load on the delaminated beam behavior of woven carbon/epoxy laminated composites. For this purpose, composite specimens were prepared according to ASTM standard and subjected to 175 thermal cycles in the range of −30 to 60°C before conducting the mode I and mode II interlaminar fracture tests. Experimental results revealed that thermal cycles lead to a drop in maximum loading capacity of the delaminated beam as well as the interlaminar fracture toughness of the woven carbon/epoxy composites. The beam fracture toughness at initiation and propagation decreased by 8% and 12% under mode I loading and by 13.84% and 15.64% under mode II loading, respectively. In the numerical analysis, the cohesive zone model was utilized in order to predict the global response of the delaminated beams. The micro and scanning electron microscope images of fracture surfaces provide efficient insights into the identification of the main mechanisms contributing to decreasing fracture toughness under cyclic thermal load. These images show that specimens subjected to cyclic thermal load exhibited smoother surfaces, which could be due to weaker bonding between matrix and fibers after cyclic thermal loading.

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“…Some local cohesive fatigue formulations have been proposed that are not based on the Paris law, 19 but these models require problem‐specific calibration of the input properties. For example, Pan 20 performed analyses of the R‐DCB using model parameters obtained by fitting the analysis results to the experimental results. In contrast, the present investigation relies on the mixed‐mode CF20 cohesive fatigue formulation 21 and input properties that can be obtained from a single fatigue characterization test.…”

Section: Introductionmentioning

confidence: 99%

Cohesive analysis of a 3D benchmark for delamination growth under quasi‐static and fatigue loading conditions

Raimondo

Dávila

Bisagni

2022

Fatigue Fract Eng Mat Struct

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This paper evaluates the capabilities of the recently developed CF20 cohesive fatigue model, which can predict crack initiation as well as the rates of crack propagation by relying on intrinsic relationships between a stress-life diagram and its corresponding Paris law. The model is validated here using a partially reinforced double cantilever beam (R-DCB) benchmark proposed in literature.The two parameters needed for the CF20 cohesive fatigue model were obtained by performing preliminary analyses of a conventional DCB. The analysis results indicate that the CF20 cohesive fatigue model can accurately reproduce the complex evolution of the delamination observed in the R-DCB.

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Theoretical and numerical investigation of mode‐I delamination of composite double‐cantilever beam with partially reinforced arms

Cited by 3 publications

References 39 publications

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load

Critical strain energy release rate of woven carbon/epoxy composites subjected to thermal cyclic loading

Cohesive analysis of a 3D benchmark for delamination growth under quasi‐static and fatigue loading conditions

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