Effect of adhesion defects on crack propagation in double cantilever beam test

Ali, Mahfoudh Taleb; Jumel, Julien; Shanahan, M. E. R.

doi:10.1016/j.ijadhadh.2018.05.008

Cited by 14 publications

(11 citation statements)

References 19 publications

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“…For TiT configuration, we replace equation (17) in equation (11) and equation (18) in equation (11) and we obtain respectively:…”

Section: 2interfaces With Longitudinal Patternmentioning

confidence: 99%

“…The decomposition of the finite defect into transversal with finite length and parallel with finite width results in an overlap between the two shapes. esearchers have developed a mathematical model for crack growth based on the effects of transversal defects [17] [18]. The second part, which is addressed in this research paper, is dedicated to investigating the impact of parallel defects on the total critical SERR G c of the specimen containing these defects.…”

Section: Fig 1 Transverse and Parallel Interface Defectsmentioning

confidence: 99%

“…The types of defects treated before in references cited above and in [14], [15], [16] and [17] are distributed across the entire width (transversal defects) or along the entire length (parallel defects: crack propagation is parallel to the defect length along the substrate), Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Critical SERR in the Presence of Heterogeneous Interfaces in Bonded Joints: Application to Parallel Defects in DCB Titanium alloy laser treated specimens

ALI,

JEBRI

2024

Preprint

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In this study, longitudinal defects are examined in the context of adhesively bonded structures, a subject that has remained understudied in previous investigations. Employing fracture mode I loading on Double Cantilever Beam (DCB) specimens with variable adhesion strength, we investigate the influence of weakened adhesion areas on the critical Stress Energy Release Rate (SERR). Modifications of titanium alloy specimen surfaces, with nanosecond laser treatment, alter their surface morphology dynamically. Our mechanical testing unveils a pronounced effect of weakened adhesion areas on SERR, necessitating a nuanced understanding. A comprehensive model is presented that takes both transversal and longitudinal defects into account, providing detailed insight into the effect of finite defects on SERR values. The theoretical models meticulously calculate overall critical SERR (Gc) in heterogeneous bond lines, exhibiting a compelling correlation with experimental results. The study underscores the non-linear variation of critical SERR (Gc) with the fraction of strong adhesion area, a phenomenon influenced by the crossover between areas of good and weakened adhesion.

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“…For TiT configuration, we replace equation (17) in equation (11) and equation (18) in equation (11) and we obtain respectively:…”

Section: 2interfaces With Longitudinal Patternmentioning

confidence: 99%

Section: Fig 1 Transverse and Parallel Interface Defectsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Critical SERR in the Presence of Heterogeneous Interfaces in Bonded Joints: Application to Parallel Defects in DCB Titanium alloy laser treated specimens

ALI,

JEBRI

2024

Preprint

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“…However, adhesive joints present a lack of long-term reliability because of environmental and mechanical degradations [1][2][3][4][5]. Consequently, to increase the in-service reliability and safety of adhesively bonded joints in primary structures, either a damage tolerant design [6] or a Structural Health Monitoring (SHM) approach [7,8] are, nowadays, being developed and implemented.…”

Section: Introductionmentioning

confidence: 99%

“…crack) initiation and propagation. That can be a consequence of either the presence of manufacturing defects (such as voids, kissing 2 bonds and inclusions among many others) or in-service loading conditions (such as fatigue or impacts) or both simultaneously, by the geometry of the joint and by the material of the substrates [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of mode I crack propagation in adhesively bonded joints by optical backscatter reflectometry and comparison with digital image correlation

Lima

Perrone

Carboni

et al. 2021

Theoretical and Applied Fracture Mechanics

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Evaluation of the critical SERR in the presence of heterogeneous interfaces in bonded joints: application to parallel defects in DCB titanium alloy laser-treated specimens

Taleb Ali,

Jebri,

Jumel

2024

J Braz. Soc. Mech. Sci. Eng.

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The primary aim of this investigation is to develop an analytical technique that can accurately estimate the fracture energy at the crack front while accounting for the localized interface properties. To achieve this goal, the study employs Double Cantilever Beam (DCB) specimens made of Aluminium alloys that have been chemically treated, as well as Titanium alloys that have been Laser texturized. Additionally, longitudinal defects are introduced within the bond line, specifically at the interface between the adhesive and adherents, with a parallel orientation to the crack direction. Initially, the investigation involved the characterization of bare surfaces, independent of their adhesive strength. Subsequently, Double Cantilever Beam (DCB) tests were conducted on specimens that had defects of various widths in the bonded region. The results obtained from these experiments confirmed the accuracy of the analytical estimations.It has been explained too that adhesive stiffness has a major role while mixing local fracture energies at crack front. Additionally, using a damage model, the deformation of the crack front was numerically observed and verified by capturing crack front shape while DCB testing. An interpretation was provided to explain the findings.

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Effect of adhesion defects on crack propagation in double cantilever beam test

Cited by 14 publications

References 19 publications

Evaluation of Critical SERR in the Presence of Heterogeneous Interfaces in Bonded Joints: Application to Parallel Defects in DCB Titanium alloy laser treated specimens

Evaluation of Critical SERR in the Presence of Heterogeneous Interfaces in Bonded Joints: Application to Parallel Defects in DCB Titanium alloy laser treated specimens

Experimental analysis of mode I crack propagation in adhesively bonded joints by optical backscatter reflectometry and comparison with digital image correlation

Evaluation of the critical SERR in the presence of heterogeneous interfaces in bonded joints: application to parallel defects in DCB titanium alloy laser-treated specimens

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