Flexural and vibration behaviour of co-cured CFRP composite joints with MWCNT-modified adhesive

Journal of Adhesion Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 28

Published: Nov. 4, 2024

Among the diverse adhesive-bonded joining methods, co-curing technique offers several advantages for fusing structural components. Co-curing effectively enhances specific strengths and ensures more equitable stress distribution. This research investigated multi-walled carbon nanotubes (MWCNTs) incorporated with varying wt.% in fibre-reinforced polymeric (CFRP) composite joints through co-cure bonding techniques. The effects of flexural vibration behaviour CFRP were evaluated using three-point bending free tests. Experimental results revealed that epoxy adhesive containing 0.5 nanofiller demonstrated highest strength modulus. These values significantly superior to pure adhesive, exhibiting increases 270 120%, respectively. However, 1.0 exhibited maximum natural frequency under three modes, which is 29, 17, 14% higher than adhesive. statistical analysis was examined an ANOVA, ensuring reliability findings. Optimisation prediction done Levenberg-Marquardt artificial neural network, further reinforcing confidence outcomes. overall coefficient (R) mean square error 0.99844 within acceptable range, indicating both outcomes are reliable agreement.

Language: Английский

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Enhanced flexural and vibration behavior of interleaved CFRP composite joints with modified multiwalled carbon nanotube adhesives for aerospace and aircraft applications

Polymer Composites, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

Abstract Cocured bonding and geometric modification are prominent techniques for fusing structural components in aerospace aircraft applications. This research involved the fabrication of carbon fiber‐reinforced polymeric (CFRP) adhesive‐bonded joints utilizing novel cocuring with interleaved lamination (IL‐CC) joining multiwalled nanotubes (MWCNTs) modified epoxy adhesive. Additionally, study examined flexural vibration characteristics IL‐CC CFRP composite joints. The result findings 1.0 wt% MWCNTs adhesive had best strength modulus, 78% 32% higher than pure exhibit a 285% 47% modulus neat CC Nevertheless, nanofiller 0.25 demonstrated highest natural frequency across three different modes, which 14%, 21%, 25% An ANOVA showed that MWCNT concentrations significantly influenced performance. Using Levenberg–Marquardt algorithm, an artificial neural network predicted results. overall coefficient ( R ) mean square error 0.99627 is satisfactory, indicating both outcomes dependable good agreement. results imply could be used parts. Highlights SLJs were fabricated MWCNT‐modified Attained maximum MWCNT. Statistics analyzed using one‐way technique. ANN predicts dynamic behavior SLJs.

Language: Английский

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Enhancing the performance of CFRP composite joints through a hybrid approach: Geometric modification (stepped adherends) and adhesive modification

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract For aerospace applications, co‐curing bonding is more effective than co‐bonding and secondary for joining fuselage frames to skins, wing ribs, spars skin joints. This study investigated the flexural dynamic behaviors of co‐cured carbon fiber‐reinforced polymeric (CFRP) composite joints utilizing adherend adhesive‐modified techniques. The underwent modification incorporate a stepped geometry adhesive modified by multi‐walled nanotubes (MWNCT). strength modulus were enhanced 13% 12%, respectively, when using 0.75 wt% nanotube (MWCNT) in co‐cured‐CFRP over epoxy adhesive‐stepped adherends. In addition that, both MWCNT CFRP showed 261% enhancement 45% increase contrast plain neat Interestingly, MWCNTs with demonstrated highest natural frequencies among all three vibration mode shapes, outperforming pure joint 5%, 2%, 8%, respectively. results statistical analysis known as ANOVA. Optimization prediction performed MATLAB neural net fit tool conjunction Levenberg–Marquardt algorithm. Highlights Adhesive prepared six different (MWCNTs) ultrasonication. Stepped fabricated co‐cure method. Maximum at adhesive. Statistical was done one‐way ANOVA technique. An artificial network predicts behavior

Language: Английский

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Secondary bonded and co‐bonded CFRP composite joints with innovative lamination technique: Flexural and failure analysis

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 11, 2025

Abstract Adhesively bonded techniques effectively fuse the structural components in an assembly aerospace applications. The co‐bonding is more effective than secondary bonding for joining fuselage frames to skins, wing ribs, and spars skin joints. flexural behavior failure analysis of a carbon fiber‐reinforced polymer composite single‐lap joint one crucial factor This research involved fabrication co‐bonded joints utilizing vacuum bag hand lay‐up method, incorporating geometric modification techniques, including interleaved covered lamination. strength was examined through three‐point bending test. results indicate that with lamination has attained maximum compared others. values are 80% higher neat Moreover, single lap samples were using ASTM D5573 standard. Furthermore, these modifications CFRP confirmed significant enhancement experimental less 5% error rates. Highlights Carbon polymeric (CFRP) made methods. SB CB methods utilized fabricate CL‐SBT exhibits high (639 MPa) modulus (45.94 GPa). A thin‐layer cohesive observed joints, fiber tear

Language: Английский

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Effect of 3-Aminopropyl-Trimethoxysilane Functionalization and Co-Cure Manufacturing on enhancing the Structure properties of GFRP Composite Joint

Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 138053 - 138053

Published: Jan. 1, 2025

Language: Английский

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The impact of graphene reinforcement on z-pin and adhesively bonded composite for enhancing flexural strength of co-cured single lap joints

The Journal of Adhesion, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 32

Published: Feb. 6, 2025

The present work presents an investigation into the flexural characteristics of a composite joint consisting various volume percent carbon fiber reinforced polymer (CFRP) Z-pins inserted glass (GFRP) Co-cure single lap (CC-SLJ). strength (SLJ) with 2.5 (vol%) CFRP Z-Pin is higher than that other reinforcements different Z-pin percentages. bending SLJ was examined using optimized varying pin alignment (30°, 45°, 60°, and 90°), it found 90° orientation showed good improvement in strength. Compared to plain SLJ, 1.25% graphene nanoparticles (GNP) incorporated CC-SLJ significantly increased by 45.59%. dual reinforcement vol% 1.25 wt.% GNP exhibited high multi-reinforcement epoxy/GNP adhesive, graphene-reinforced were enhancement. results three-point test indicated decrease stiffness as percentage increases. specimen's fractured surface under microscope following testing procedure, images captured detect any indications failure. It adding Z pins makes rougher easier for adhesive adherend stick each other.

Language: Английский

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Predicting shear performance of Co-cured CFRP composite joints with covered lamination: an artificial neural network and optimization approach

Journal of Adhesion Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 26

Published: April 11, 2025

Language: Английский

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Enhancing strength and stiffness of GFRP joint via 3-Glycidyloxypropyl-trimethoxysilane modified glass powder and co-cure manufacturing technique

Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 137542 - 137542

Published: Oct. 1, 2024

Language: Английский

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Hollow glass microsphere/polybutadiene composites with low dielectric constant and ultralow dielectric loss in high‐frequency

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 27, 2024

Abstract High‐frequency dielectric materials have been widely and rapidly applied in areas such as automotive radar, Internet of Things, artificial intelligence, quantum computing. Currently, the challenge high‐frequency lies reducing constant ( D k ) loss f without sacrificing its mechanical properties. This study addresses this by introducing air, most common “low factor,” into polymer matrix form hollow glass microspheres. Meanwhile, reactive vinyl groups were also introduced onto surface microspheres, enabling an interfacial chemical reaction between side polybutadiene so that organic–inorganic interface compatibility peel strength are simultaneously improved. Consequently, minimum 1.29 0.0012 3–18 GHz achieved, reaches 0.65 N/mm. Molecular dynamics simulations, analysis properties, reveal influence microspheres' morphology structure on their performance adhesive strength. paper provides effective strategies for structural design preparation high‐frequency, low‐dielectric composites, contributing to further development next‐generation microwave communication devices towards higher frequencies faster information transmission.

Language: Английский

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Enhancement of pin‐bearing behavior of pultruded FRP profiles by multi‐directional fiber architecture design

Polymer Composites, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract The low resistance of bolted joints in pultruded unidirectional (UD) fiber‐reinforced polymer (FRP) profiles limits the load grade truss bridges due to shear damage along UD fibers. To address this issue, study proposes multi‐directional (MD) fiber architecture FRP improve ultimate bearing strength joints. digital image correlation shows that addition off‐axis fibers MD prevents failure profile. As a result, strengths are enhanced attributed “off‐axis tie action”. Micro‐computed tomography emerged from outer plies, including breakage 90° and ±45° kinking 0° break tension when resisting profiles. indicated contribution each ply dominant instead delamination, which increases These findings facilitate controlling evolution designing high‐resistance Highlights Multi‐directional improved by 28.5% – 33%. Off‐axis bent under pin‐bearing, forming action until breakage. Fiber contributed failure. Strain localization redistribution were observed using DIC.

Language: Английский

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