On the flexural response of nanoparticle-reinforced adhesively bonded joints mating 3D-Fiber Metal Laminates – A coupled numerical and experimental investigation

Mottaghian, Fatemeh; Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Farid

doi:10.1016/j.ijadhadh.2022.103278

Cited by 13 publications

(5 citation statements)

References 34 publications

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“…A few years ago, a novel class of FML was developed by our research group, referred to as 3D fiber metal laminates (3DFMLs). Since its inception, the material system has undergone a systematic series of experimental and numerical investigations to establish its behavior under quasi-static (including buckling response) [ 2 ], low-velocity out-of-plane impact [ 3 , 4 ], in-plane impact [ 5 , 6 ], and joining techniques [ 7 , 8 , 9 ]. 3DFMLs have excellent stiffness and strength-to-weight ratios due to their unique internal geometry and configuration, making them a strong candidate for applications in various industries.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Low-Velocity Impact Responses and Compressive Residual Strengths of GLARE and a 3DFML

Wang

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2023

Polymers

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The impact performance and compression after impact characteristics of 2D and 3D fiber metal laminates (FMLs) are investigated both experimentally and numerically. Commercial-grade GLARE3A-3/2-0.3, and a recently developed FML, which incorporates a unique 3D glass fabric, are used in the study. Both FMLs have similar areal densities. The specimens are subjected to impact loading at three energy levels—low, intermediate, and high. The test results indicate that GLARE is slightly more resilient under impact compared to the 3DFML. However, since GLARE is much thinner than the 3DFML, the two-material systems exhibit very different failure modes. GLARE and 3DFML lost up to 62.6% and 41.5% of their original compressive load-bearing capacity, respectively. Robust and accurate finite element models are developed that can predict the damage evolution and failure modes of both FMLs. Knowing the level of reduction in the residual load-bearing capacity of a material resulting from an impact is of practical importance when assessing the service life of materials. However, further exploration would be required to determine how the information obtained through testing relatively small-sized specimens in a laboratory environment can be extrapolated to larger real-life structural components.

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Section: Introductionmentioning

confidence: 99%

Comparison of the Low-Velocity Impact Responses and Compressive Residual Strengths of GLARE and a 3DFML

Wang

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2023

Polymers

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“…However, beyond this threshold, these properties begin to decline due to agglomeration and a low energy absorption capacity. 25 Incorporating graphene nanoparticles (GNPs) into the adhesive used in adhesively bonded joints enhances static strength, fatigue strength, failure load, fiber tensile failure area, and joint displacement. The mechanical and thermal behaviors of nanocomposite adhesives show changes in the quantity of nanostructures present.…”

Section: Introductionmentioning

confidence: 99%

“…36 Based on a detailed analysis of the existing literature, it is evident that the enhancement of toughness and strength in adhesives holds significant importance. Numerous scholars [23][24][25][26][27][28][29][30][31][32][33][34][35] have proposed the use of microand nano-fillers as a strategy to improve the mechanical characteristics of adhesives. After conducting an analysis of the relevant literature, we found that the co-curing SLJ fabrication process with unidirectional glass fiber and adhesive incorporated various (0.25, 0.5, 0.75, 1.0, 1.25, and 1.5) weight percentages of GNP that had not before been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The enhanced energy absorption capacity and interfacial bonding between the epoxy molecules, GNP, and adherend attribute to this increase in joint capacity, shear strength, and flexural strength. However, beyond this threshold, these properties begin to decline due to agglomeration and a low energy absorption capacity 25 . Incorporating graphene nanoparticles (GNPs) into the adhesive used in adhesively bonded joints enhances static strength, fatigue strength, failure load, fiber tensile failure area, and joint displacement.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Venugopal,

Sudhagar P

2023

Polymer Composites

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Adhesive‐bonded joints in glass fiber‐reinforced polymer (GFRP) composite structures give numerous benefits, such as greater flexibility, good specific strength, improved fatigue resistance, and the ability to reduce stress concentration. Consequently, adhesive‐bonded joints are considered more influential if compared to fasteners. This research investigates the effects of incorporating graphene nanoparticles (GNPs) into the adhesive layer on several aspects of adhesively bonded co‐cure (CC) single‐lap GFRP composite joints. These aspects include shear strength, flexural strength, failure mechanisms, and fractography studies. The study examined six distinct weight percentages of GNP, specifically 0.25, 0.50, 0.75, 1.0, 1.25, and 1.5 wt.%, which are considered to enhance the interfacial strength of adhesive joints. Based on the research, 0.75 wt.% of GNP single‐lap joint (SLJ) shear strength improved by 69.40% when compared to the plain matrix SLJ. This suggests excellent load transmission between adherends. In addition, the flexural strength increased by 46.57% in the specimens containing 1.25 wt.% GNP when compared to the plain matrix used to bond in SLJ. After testing, fractured specimen microscopic images were used to examine failure mechanisms. According to fractography studies, adding GNPs to the adhesive causes surfaces to become rougher, which improves the adhesion between the adhesive and the adherends.Highlights Six distinct wt.% of GNPs were used to prepare the matrix by sonication. Single‐lap GFRP composite joints were fabricated through a CC technique. SLJ's maximum shear strength was found at 0.75 wt% of GNP. SLJ's maximum flexural strength was found at 1.25 wt% of GNP. Failure analysis was conducted using microscopes and FESEM images.

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“…Additionally, due to the introduction of holes, there is a local stress concentration, which hinders joint performance, as composites are very sensitive to notches [ 11 , 12 ]. Given this scenario, the usage of adhesive joints has been established as a viable alternative for joining these materials [ 10 , 13 , 14 ]. These joints are suitable due to their capacity to bond structures with multiple materials [ 14 ], maintaining high joint strength, as well as a smoother stress distribution [ 11 , 14 ] than the alternative joining processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Thermal Residual Stresses on Multimaterial Adherends in Single-Lap Joints

et al. 2022

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The presence of residual stresses in composite materials can significantly affect material performance, especially when integrated in bonded joints. These stresses, often generated during the cure process, can cause cracking and distortion of the material, and are caused by differences in the coefficients of thermal expansion or cure shrinkage. In the current research, multimaterial adherends combining carbon-fibre-reinforced polymer (CFRP) and aluminium in a single-lap joint (SLJ) configuration are analysed, allowing us to understand the effect of the thermal residual stresses, developed during the curing process, in the overall performance of the joints. A numerical model resorting to a finite element analysis (FEA) is developed to assess and predict the behaviour of the joints. The use of FML (fibre metal laminates) was found to significantly improve the strength of the joints, as well as the failure mode. The proposed geometry performed similarly to the comparable FML geometry, in addition to a decrease in the joint weight.

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On the flexural response of nanoparticle-reinforced adhesively bonded joints mating 3D-Fiber Metal Laminates – A coupled numerical and experimental investigation

Cited by 13 publications

References 34 publications

Comparison of the Low-Velocity Impact Responses and Compressive Residual Strengths of GLARE and a 3DFML

Comparison of the Low-Velocity Impact Responses and Compressive Residual Strengths of GLARE and a 3DFML

Enhancing shear and flexural strength of single lap composite joints with a graphene nanoparticle‐reinforced adhesive through a co‐curing technique

Experimental and Numerical Study of Thermal Residual Stresses on Multimaterial Adherends in Single-Lap Joints

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