Strength of cylindrical butt joints bonded with epoxy adhesives under combined static or high-rate loading

Murakami, Sho; Sekiguchi, Yu; Sato, Chiaki; Yokoi, Eiichiro; Furusawa, Toru

doi:10.1016/j.ijadhadh.2015.12.030

Cited by 31 publications

(49 citation statements)

References 37 publications

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“…According to Figure 5A, the average tensile strength is equal to 56 MPa, in agreement with literature results on high‐strength structural epoxy adhesives 21 . The scatter of the tensile strength between the three tests is limited and smaller than 0.5%, proving the effectiveness of the procedure developed for the preparation of the adhesive butt‐joint.…”

Section: Resultssupporting

confidence: 88%

Fatigue response up to 10⁹ cycles of a structural epoxy adhesive

Tridello

Ciardiello

Paolino

et al. 2020

Fatigue Fract Eng Mat Struct

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In the present paper, the very-high-cycle fatigue (VHCF) response of a structural adhesive used for automotive applications, Betaforce 4600G modified with microspheres, has been experimentally assessed. Ultrasonic fully reversed tension-compression tests up to 10 9 cycles have been carried out with the testing machine developed by the authors on adhesives without macroscopic defects and on adhesives with artificial defects, inserted during the butt-joint preparation. Fracture surfaces have been observed with the optical microscope and the P-S-N curves estimated. Experimental results have shown that defect location significantly affects the VHCF strength and fracture surfaces exhibit a peculiar morphology with three distinct characteristic regions. K E Y W O R D Saccelerated tests, epoxy resin, structural adhesive, ultrasonic fatigue tests, very-high-cycle fatigue (VHCF)

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Section: Resultssupporting

confidence: 88%

Fatigue response up to 10⁹ cycles of a structural epoxy adhesive

Tridello

Ciardiello

Paolino

et al. 2020

Fatigue Fract Eng Mat Struct

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“…al. on epoxy bonded steel butt joints had higher values but the testing was combined torsional shear and tensile testing together and can not be compared directly with our pure torsional shear test [ 17 ].…”

Section: Resultsmentioning

confidence: 99%

Torsional shear strength of steel joined with high performance aerospace adhesives at cryogenic and elevated temperatures

et al. 2018

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Pure torsional shear tests of joints glued with two different aerospace grade adhesives were performed using a specifically designed and constructed torsional shear test equipment. The developed test equipment allows for measuring of pure torsional shear strength under cryogenic and at elevated temperature conditions. The adhesives Hysol EA 9321 and 3M Scotch-Weld EC-9323-2 B/A were used to join steel torsional shear test specimens. Torsional shear tests were performed from -180°C to 150°C. In addition torsional shear fatigue tests were also performed at various loads and the effect of cryogenic aging (cyclic cooling and warming) on the torsional strength of the joints was investigated. The results showed that both sets of adhesive joints achieved three times higher torsional shear strength at -180°C compared to room temperature.

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“…The first step in the preparation of the surface of the substrates was the use of sandpaper (#600 mesh grit) to remove any particles and achieve a homogenous roughness, being after degreased with acetone. The bottom substrate of the specimen was positioned in a jig, 40 the adhesive was first applied on the top section of that substrate and the upper substrate was then assembled in the mould, positioned by the cylinder support of the jig. The adhesive thickness was controlled by a micrometer installed at the upper part of the jig.…”

Section: Specimen Fabricationmentioning

confidence: 99%

Strain rate dependence of a crash resistant adhesive as a function of temperature for the automotive industry

Machado

Hayashi

Nunes

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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The wide and diverse application of adhesives in the automotive industry has increased over the last decades, driven by the need to produce efficient yet strong vehicles, able to meet both fuel economy and safety standards. This method allows to bond a variety of dissimilar materials used for structural parts, as well as to achieve lighter structures, and higher failure loads over other traditional methods such as fastening or welding. It is therefore important to understand the behaviour of adhesives under a wide range of strain rates and temperatures. These data are fundamental to ensure vehicle safety, as adhesives must be able to sustain impact conditions, deforming but at the same time keeping the integrity of the structure and transmitting the loads without damaging the joint. The aim and novelty of this work is the complete mechanical characterization of a high-performance crash resistant adhesive under varied strain rate and temperature conditions, necessary for the validation of structures used in the automotive industry. The mechanical behaviour of these materials is still poorly understood and described in the literature. The results showed a change in the mechanical properties of the adhesive with the variation of strain rate (quasi-static and impact of 3 m/s) and temperature (−30, 24 and 80 ℃). With the mechanical properties determined it was possible to define cohesive laws for implementation in finite element simulation, as a function of strain rate and temperature.

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Strength of cylindrical butt joints bonded with epoxy adhesives under combined static or high-rate loading

Cited by 31 publications

References 37 publications

Fatigue response up to 10⁹ cycles of a structural epoxy adhesive

Fatigue response up to 10⁹ cycles of a structural epoxy adhesive

Torsional shear strength of steel joined with high performance aerospace adhesives at cryogenic and elevated temperatures

Strain rate dependence of a crash resistant adhesive as a function of temperature for the automotive industry

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Strength of cylindrical butt joints bonded with epoxy adhesives under combined static or high-rate loading

Cited by 31 publications

References 37 publications

Fatigue response up to 109 cycles of a structural epoxy adhesive

Fatigue response up to 109 cycles of a structural epoxy adhesive

Torsional shear strength of steel joined with high performance aerospace adhesives at cryogenic and elevated temperatures

Strain rate dependence of a crash resistant adhesive as a function of temperature for the automotive industry

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Fatigue response up to 10⁹ cycles of a structural epoxy adhesive

Fatigue response up to 10⁹ cycles of a structural epoxy adhesive