Effect of reinforcements at different scales on mechanical properties of epoxy adhesives and adhesive joints: a review

Giv, Ali Nemati; Ayatollahi, M.R.; Ghaffari, Samin; Silva, Lucas F. M. da

doi:10.1080/00218464.2018.1452736

Cited by 102 publications

(40 citation statements)

References 145 publications

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“…Polymer-based nanocomposites have been widely used in various applications, such as adhesive materials, due to their unique electrical, thermal and mechanical properties compared to neat polymers. 3,4 In the following, a major breakthrough made by Novoselov et al. 5 through discovering graphene nano-platelets with around 130 GPa strength and 1 TPa Young’s modulus, which is the strongest material ever discovered, 6 demonstrating the large potential of these materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of reduced graphene oxide on mechanical behavior of an epoxy adhesive in glassy and rubbery states

Khabaz-Aghdam

Behjat

Marques

et al. 2021

Journal of Composite Materials

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The mechanical behavior of an adhesive, in neat state and reinforced with up to 0.5 wt% of reduced graphene oxide (RGO) was investigated here. Tests were done at temperatures between the ambient temperature and the glass transition temperature ( Tg[Formula: see text] of the adhesive. Using a metal mold, cured plates of the neat and RGO reinforced epoxy adhesive were prepared. The adhesive powder and the bulk dumbbell-shaped specimens, obtained from cured adhesive plates, were subjected to differential scanning calorimetry (DSC) and tensile tests, respectively, to obtain the Tg as well as mechanical properties of the adhesives. The results indicated that adding RGO up to 0.5 wt% increased the glass transition temperature, the modulus of elasticity, and the strength of the adhesive. It was found that the presence of RGO reduced the adhesive’s strain at the break at the ambient temperature. However, at high temperatures, near the Tg, the ultimate strain of RGO-reinforced adhesives decreased slightly when compared to the ultimate strain of the neat specimens. This explains the reduction in toughness at ambient temperature obtained by adding RGO and the increase at high temperatures. Finally, the failure morphology of the neat and RGO-reinforced adhesive specimens was investigated using microscopic imaging of the specimens’ failure cross-sections, which supported and justified the experimental observations.

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Section: Introductionmentioning

confidence: 99%

Effect of reduced graphene oxide on mechanical behavior of an epoxy adhesive in glassy and rubbery states

Khabaz-Aghdam

Behjat

Marques

et al. 2021

Journal of Composite Materials

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“…Each filler material used has a different strength which is in accordance with the ability of each of these materials. The size of the ability to conduct electricity is influenced by several factors including the type of material, the amount of material and the even distribution of material [15]. The test results show the strength value of the electrical conductivity of the epoxy mixture sequentially from the strongest are nanogold particle, copper powder, aluminum powder, iron powder and epoxy without the addition of filler.…”

Section: Uneven Powder Grainsmentioning

confidence: 99%

Effect of Filler on Shear Strength and Electrical Conductivity in Epoxy Based Aluminium Bonded

Yuniwantoro

Surojo²,

Smaradhana³

et al. 2020

Mekanika: Majalah Ilmiah Mekanika

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<div class="WordSection1"><p>Adhesive joint is one of the material joining techniques using a low temperature with the help of polymer adhesives to connect a material. This connection is widely used in infrastructure, automotive and electronics industries. This research was conducted to determine the effect of filler on shear strength and electrical conductivity on epoxy-based aluminum connections. The fillers used were aluminum powder, iron powder, copper powder with a grain size of 0.071 mm each and nanogold particles in liquid form. The connection type used is a single lap joint with an end tab modification at the end of the connection. The highest shear strength value is in the joint without the addition of filler of 3.17 MPa and the lowest value is in the connection with the addition of aluminum powder filler of 1.14 MPa. The highest value of electrical conductivity was obtained in epoxy mix with nanogold particle filler which was worth 13.1 S / m and the value for epoxy without the addition of filler was not detected because the resistance was too large. This shows that the addition of filler has an effect on the value of shear strength, which is to reduce the value of the shear strength, while for testing the conductivity of electricity the addition of filler has an effect to provide electric properties on epoxy.</p></div>

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“…1,7–9 There are some solutions available in the literature to improve the toughness of brittle adhesives. 10,11 Recently, some researchers have considered cork particles as toughening particles to enhance epoxy-based adhesives. However, the effect of the particles in joint strength improvement needs further research.…”

Section: Introductionmentioning

confidence: 99%

Influence of microcork particles on the lap shear strength of an epoxy adhesive subjected to fatigue loading and different environmental conditions

Akhavan‐Safar

Barbosa

Ayatollahi

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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The present study deals with the effects of temperature and cyclic loading on the strength of single lap adhesive joints enhanced with different amounts of microcork particles. To achieve this, different joints with various overlap lengths were manufactured and tested. The joints were tested at two different temperatures (−20 ℃ and 75 ℃) in quasi-static conditions. Results of high temperature (75 ℃) show that the joints tensile strength decreases with the amount of cork particles. For low temperature (−20 ℃), the strength of the joint with 1 vol.% of cork increased; however, higher amounts of cork led to a reduction of the joint strength. To investigate the influence of cork particles on the fatigue endurance, joints were tested at room temperature under sinusoidal cyclic loading. Based on the experimental data it was found that the cork particles can significantly improve the fatigue life of adhesive joints (up to 4.6 times). Microfailure analysis of the tested joints was also performed using the scanning electron microscope technique.

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Effect of reinforcements at different scales on mechanical properties of epoxy adhesives and adhesive joints: a review

Cited by 102 publications

References 145 publications

Effect of reduced graphene oxide on mechanical behavior of an epoxy adhesive in glassy and rubbery states

Effect of reduced graphene oxide on mechanical behavior of an epoxy adhesive in glassy and rubbery states

Effect of Filler on Shear Strength and Electrical Conductivity in Epoxy Based Aluminium Bonded

Influence of microcork particles on the lap shear strength of an epoxy adhesive subjected to fatigue loading and different environmental conditions

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