A review of research advances in epoxy-based nanocomposites as adhesive materials

On adhesive properties of nano-silica/epoxy bonded single-lap joints

This review paper aims at reporting some of the notable works carried out concerning the use of nanoparticles (NPs) as a means of improving the resistance of fiber-reinforced polymer composite materials (FRPs) and adhesively bonded joints (ABJs) to delamination initiation and propagation. Applications of various nanoparticles, such as carbon-based, ceramic-based and mineral-based are discussed. The main properties that have been considered for improving the delamination and fatigue resistance of FRPs are the interlaminar shear strength, fracture toughness, and fracture energy. On the other hand, cohesive and interfacial strengths have been the focused parameters in the works that considered enhancement of ABJs. The reported results indicate that inclusion of NPs in polymeric matrices leads to improvement of various material properties, even though some discrepancies in the results have been noted. Notwithstanding, additional research is required to address some of the issues that have not yet been tackled, some of which will be identified throughout this review article.

Use of Nanoparticles for Enhancing the Interlaminar Properties of Fiber-Reinforced Composites and Adhesively Bonded Joints-A Review.

Because of their many advantages, adhesively bonded joints are intensively used in many engineering fields. So, the mechanical research of the adhesively bonded joints is very important to use these joints safely. There are many studies performed by researchers to investigate the mechanical properties of the adhesive joints. There has been a considerable interest in nanoparticles added to structural adhesives recently because nanoparticles improve the mechanical properties of adhesives and joints. In this paper, different nanoparticles reinforced by epoxy adhesive, and neat adhesive were used to produce single lap joints. The static and fatigue strengths of single lap joints incorporating nanoparticles were compared to those without nanoparticles. Experiments were performed at 20 mm overlap length. DP460 epoxy was used as the adhesive material, and nano-Al2O3, nano-TiO2 and nano-SiO2 were used as the nanoparticles; and AISI 304 stainless steel plates were used as the adherents. The results of the experimental research revealed that average failure load increased significantly in nanoparticle-reinforced adhesive joints. The highest average failure load was obtained with 4 wt% nano-Al2O3 in epoxy adhesive. Fatigue tests were performed at 10 Hz frequency, and 0.1 loading ratio (R). When the fatigue test results were examined, it was observed that the addition of the nano-Al2O3 and nano-SiO2 to the adhesive increased fatigue strength of the adhesive joints, on the other hand, the addition of the nano-TiO2 to the adhesive reduced fatigue strength of the adhesive joints.

Experimental determination of the static and fatigue strength of the adhesive joints bonded by epoxy adhesive including different particles

Recently, fiber metal laminates (FMLs) have attracted considerable application in many industries due to their outstanding properties. FMLs are hybrid materials that are fabricated by adhesion of t...

Recent trend in developing advanced fiber metal laminates reinforced with nanoparticles: A review study:

Monitoring the integrity of adhesive joints during fatigue loading using carbon nanotubes

In Situ Health Monitoring of Adhesively Bonded Joints during Fatigue Using Carbon

Different types of carbon nanotubes (CNTs) with and without attached functional groups and with different loadings were used to prepare electrically conductive epoxy adhesive. By incorporating only 1 wt% of pristine single-wall CNTs the resistance of single lap joints (SLJs) was reduced by over 10 orders of magnitude compared to the neat resin. The type, loading and functionalization have little effect on the apparent shear strength of SLJs as the joints displayed mostly adhesive failure. Nanotube loading and functionalization have a strong influence on the fatigue life of the SLJs. Over 4 wt% of multiwall CNTs the fatigue life is only half of that of the neat resin. Repeated functionalization gradually decreases the length of nanotube pullouts and significantly increases the fatigue life. The tradeoff of improved fatigue life is a higher electrical resistance.

Influence of the Carbon Nanotube Type, Loading and Chemical Functionalization on the Fatigue Resistance of Aluminum Lap Joints

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Monitoring the integrity of adhesive joints during fatigue loading using carbon nanotubes

In Situ Health Monitoring of Adhesively Bonded Joints during Fatigue Using Carbon

Influence of the Carbon Nanotube Type, Loading and Chemical Functionalization on the Fatigue Resistance of Aluminum Lap Joints