The influence of aging in salt chamber on strength of aluminum – CFRP single lap joints

Golewski, Przemysław; Sadowski, Tomasz; Pietras, Daniel; Dudzik, Sylwia

doi:10.1016/j.matpr.2020.12.510

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…However, it should also be taken into account that mechanical loads are not the only ones that can affect the durability and strength of the entire structure. Environmental loads [26,27], such as during thermal or chemical disinfection or the effect of UV radiation, would also have to be taken into consideration. In addition, the tabletop structure is often not only made of composite but also of other materials, as shown for model 4, in which the aluminum plate plays an intermediary role and is bonded to the bottom by default.…”

Section: Discussionmentioning

confidence: 99%

Composite Medical Tabletops Made of CFRP with Different Cross-Sections: Numerical Analysis and Laboratory Testing

Golewski,

Pietras,

Sadowski

et al. 2023

Materials

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This paper presents the results of laboratory tests of CFRP (carbon fiber-reinforced polymer) laminates, which allowed the development of numerical material models. The obtained data were used in a further stage to perform numerical simulations of four variants of medical tabletops, differing, among other features, in the shape of the cross-section. Maximum deflections and effort in the composite material were analyzed. The final step was to perform a laboratory test for one of the tabletop versions, the results of which confirmed the correctness of the numerical calculations. This work is aimed at both researchers and designers involved in the practical application of fiber-reinforced polymer matrix composites.

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Section: Discussionmentioning

confidence: 99%

Composite Medical Tabletops Made of CFRP with Different Cross-Sections: Numerical Analysis and Laboratory Testing

Golewski,

Pietras,

Sadowski

et al. 2023

Materials

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“…Both of these techniques can be used to join composites to other materials, but mechanical joints usually require a hole, and stress concentrations occur, which is dangerous with the brittle linear characteristics of the PMC material [ 8 ]. An alternative is adhesive joints [ 9 , 10 , 11 ], which do not require interference with the structure of the parts to be joined. Their characteristic feature is that the stress concentrates at the ends of the lap [ 12 ], which makes this type of joint sensitive to the technology of their manufacture.…”

Section: Introductionmentioning

confidence: 99%

Tensile Behaviour of Double- and Triple-Adhesive Single Lap Joints Made with Spot Epoxy and Double-Sided Adhesive Tape

Golewski¹

2022

Materials

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Dual adhesives are mainly used to increase the strength of single lap joints (SLJs) by reducing the stress concentration at its ends. However, they can also be used to design the characteristics of the joint so that its operation and failure occur in several stages. This paper presents the results of uniaxial tensile tests for dual-adhesive and triple-adhesive SLJs. The adherends were made of aluminum and glass fiber-reinforced polymer (GFRP) composite. For dual-adhesive SLJs, 10 epoxies and 1.6 mm thick double-sided adhesive tape were used. The stiffest (Epidian 53 (100 g) + “PAC” hardener (80 g)) and most elastic (Scotch-Weld 2216 B/A Translucent) joints were determined, which were then used in a triple-adhesive joint with the same double-sided adhesive tape. Circular holes of different diameters from 8 mm to 20 mm were made in the double-sided adhesive tape, which were filled with liquid epoxy adhesive by injection after the adherends were joined. By using the double-sided adhesive tape, the geometry of the epoxy joints was perfect, free of spews, and had a constant thickness. The effect of the spot epoxy joint diameters and the arrangement of stiff and elastic joints in the SLJs were analyzed using digital image correlation (DIC).

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“…In many cases, they are also a source of concentrated stress. Therefore, another group of joints that can be used to connect polymer 3D prints are adhesive joints, either using liquid adhesives [16,17], tapes [18] or dual-adhesive [19,20]. Their advantage is that the load is transferred over a considerable area and thus distribution of the stress, in the joined parts, is in many cases free of concentration.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Single-Lap, Hybrid Joints, Made of 3D Printed Polymer and Aluminium Adherends

et al. 2021

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This paper presents the results of an experimental study into single-lap joints. One part of the joint was made as a 3D printed polymer and had cylindrical tenons, while the other part was made of an aluminium flat bar having mortises whose diameter and distribution corresponded to the polymer tenons. In addition to the mechanical joint, a layer of double-sided VHB (Very High Bond) adhesive tape was also placed in the lap, thus creating a hybrid joint. In total, 80 specimens were made, which were divided into four groups: A—specimens with one tenon of different diameters, B—specimens with different number of tenons of the same diameter, C—specimens characterised by multi-stage operation and R—reference specimens, connected only by double-sided adhesive tape. The joints were subjected to uniaxial tensile tests. The force–displacement characteristics obtained and the energy required, up to the point of the failure of the joints, have been analysed in this paper. The four and six-stage joints designed can significantly increase the safety of the structures in which they will be used.

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The influence of aging in salt chamber on strength of aluminum – CFRP single lap joints

Cited by 7 publications

References 40 publications

Composite Medical Tabletops Made of CFRP with Different Cross-Sections: Numerical Analysis and Laboratory Testing

Composite Medical Tabletops Made of CFRP with Different Cross-Sections: Numerical Analysis and Laboratory Testing

Tensile Behaviour of Double- and Triple-Adhesive Single Lap Joints Made with Spot Epoxy and Double-Sided Adhesive Tape

Experimental Study of Single-Lap, Hybrid Joints, Made of 3D Printed Polymer and Aluminium Adherends

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