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

Saraç, İsmail; Adin, Hamit; Temiz, Şemsettın

doi:10.1016/j.compositesb.2018.08.006

Cited by 76 publications

(42 citation statements)

References 26 publications

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“…The positive effects of the nano-Al 2 O 3 , especially on mechanical properties (the nanoparticles are able to significantly increase the strength at the fiber/matrix interface [ 52 ]), can be found also when these particles are added in fiber reinforced composites based on an epoxy matrix, even at very low contents (i.e., 1–0.5 wt.%) [ 53 , 54 , 55 ]. The beneficial effects of nanoalumina are also reported in the field of epoxy adhesives [ 51 , 56 , 57 ]. As in any other application of nanocomposites, a key role is played by the effective dispersion of nanoparticles inside the epoxy matrix.…”

Section: Nanofillers For Epoxy Resinsmentioning

confidence: 95%

“…The inclusion of such nanoparticles in epoxy-based coating formulations is capable to improve to a large extent the corrosion resistance of metallic (steel) surfaces, especially at a medium (i.e., 5 wt.%) filler content [ 64 ]. The applications of epoxy resins as adhesives take advantage with the addition of a similar amount of nanosilica (i.e., 6 wt.%), also when analyzing the response to dynamic/cyclic loads with fatigue tests [ 56 ]. Referring to the structural applications involving FRP, effective interfacial interactions of silica nanoparticles with the epoxy matrix of a reinforced composite can also lead to significant enhancements of its mechanical (tensile and flexural strength), vibration, and damping characteristics [ 65 ].…”

Section: Nanofillers For Epoxy Resinsmentioning

confidence: 99%

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Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Frigione

Lettieri

2020

Materials

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This paper aims at reviewing the works published in the last five years (2016–2020) on polymer nanocomposites based on epoxy resins. The different nanofillers successfully added to epoxies to enhance some of their characteristics, in relation to the nature and the feature of each nanofiller, are illustrated. The organic–inorganic hybrid nanostructured epoxies are also introduced and their strong potential in many applications has been highlighted. The different methods and routes employed for the production of nanofilled/nanostructured epoxies are described. A discussion of the main properties and final performance, which comprise durability, of epoxy nanocomposites, depending on chemical nature, shape, and size of nanoparticles and on their distribution, is presented. It is also shown why an efficient uniform dispersion of the nanofillers in the epoxy matrix, along with strong interfacial interactions with the polymeric network, will guarantee the success of the application for which the nanocomposite is proposed. The mechanisms yielding to the improved properties in comparison to the neat polymer are illustrated. The most important applications in which these new materials can better exploit their uniqueness are finally presented, also evidencing the aspects that limit a wider diffusion.

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Section: Nanofillers For Epoxy Resinsmentioning

confidence: 95%

Section: Nanofillers For Epoxy Resinsmentioning

confidence: 99%

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Frigione

Lettieri

2020

Materials

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“…However, these parameters are interconnected between and impose bond strength crucially [9,10]. Although some of the studies report different adhesive strengths with high fluctuation [5,[11][12][13]] experiments need to be performed by considering all factors into account to clarify results. From this perspective of view, separate works have been conducted by researchers by taking thickness, overlap length, adherend type, adherend thickness, strain rate, and surface quality into consideration.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Epoxy Based Adhesive Failure on Mono- and Bi-Material Single Lap Joints Under Different Displacement Rates

Asl¹,

Çam

Orhan

et al. 2020

Frattura Ed Integrità Strutturale

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Development in material science imposes to use different materials in production. This causes a problem for joining different materials because traditional joining techniques such as welding could not overcome this problem in industries such as automotive. Hence, adhesive bonding overcomes this problem by its superiorities to join different materials. The joint strength of epoxy-based adhesives is affected by adhesive thickness, adherent's surface quality, and curing conditions. In this study, two different materials (SAE 304 and AL7075) were bonded by epoxy adhesive (3M DP460NS) as single lap joint (SLJ) of Aluminum-Aluminum, Steel-Steel, and Aluminum-Steel. The effects of adhesive thickness (0.05, 0.13, 0.25 mm) and surface roughness (281, 193, 81 nm) to strength were compared. SLJs were tested for 1, 10, 25 and 50 mm/min displacement rates. Adhesive surface structures were imaged by Scanning Electron Microscopy (SEM) to investigate adhesive fractures. Surface roughnesses were examined by using Atomic Force Microscopy (AFM) to compare its influence on failure load. Finite Element Analysis (FEA) was conducted by using Cohesive Zone Model with ANSYS 18.0 software to obtain stress distribution of adhesive. Optimum values according to the present conditions of the thickness (0.13mm) and roughness (<200nm) were determined. Experimental results were demonstrated that while displacement rates rose, failure loads increased as well. FEA analysis was fit to experimental results. It has been observed that along with material type, peel stresses become an important factor for joint strength.

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“…Due to this brittle nature, the resultant stresses will cause further damage or propagation of existing cracks, which will greatly affect the lifetime of the component and may lead to catastrophic failure [1][2][3]. It is difficult to detect cracks in adhesivelybonded and fibre-composite structures, as the critical flaw size is very small due to their brittle nature, so the epoxies must be modified to prevent premature failure [1][2][3]. They are used in safety-critical structural applications, as they enable lightweight construction and promote fuel efficiency, for example in the construction of aircraft, cars and ships [4,5].…”

Section: Introductionmentioning

confidence: 99%

Fracture and toughening mechanisms of silica- and core–shell rubber-toughened epoxy at ambient and low temperature

Tsang

Taylor

2019

J Mater Sci

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The highly cross-linked thermosetting polymers used as adhesives and as the matrices of fibre composites for the construction of lightweight vehicles are very brittle, and finding effective toughening solutions for such engineering applications is a long-standing problem. An anhydride-cured thermosetting epoxy polymer has been modified by the addition of different wt% of silica nanoparticles, core-shell rubber particles and hybrids with equal wt% of both. The fracture energy was measured at ambient and low temperature (-40°C and-80°C) to understand the brittle fracture behaviour. The fracture and toughening mechanisms were identified by scanning electron microscopy of the fracture surfaces. Analytical models were used to predict the modulus and fracture energy; the predictions agreed very well with the measured values. Toughening using silica nanoparticles is especially efficient at low particle contents. This shows how epoxies can be toughened successfully for use in industrial and transport applications.

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

Cited by 76 publications

References 26 publications

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Experimental and Numerical Analysis of Epoxy Based Adhesive Failure on Mono- and Bi-Material Single Lap Joints Under Different Displacement Rates

Fracture and toughening mechanisms of silica- and core–shell rubber-toughened epoxy at ambient and low temperature

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