FRP strengthened aluminium tubular sections subjected to web crippling (original) (raw)
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Impact of fiber reinforced polymer composites on structural joints of tubular sections: A review
Thin-Walled Structures, 2022
Tubular structures are the base of rational design with the improvement in high-performance and advanced structural applications. One of the biggest challenges of these parts is their complex/superior architectural geometry, therefore, knowledge is required to understand the features of each joint. In recent times, conventional metal tubular joints are replacing with fiber reinforced polymer (FRP) tubular joints in various applications, such as aerospace, automotive, civil construction, etc. This is due to lightweight and excellent corrosion resistance of FRP tubular joints compared to conventional metal tubular joints. In this review, the use of different types of tubular joints (T, L, X, and K-joints) and their failure mechanisms are discussed in detail. Further, the role of FRP composites in joining the tubular sections and reducing their weight is discussed. In addition, some specific failure modes (chord shear failure, local buckling, brace failure, etc.) for various types of tubular joints are given in detail. At the end of this review, several practical applications based on the classifications of tubular joint structures are reviewed. This review may provide several ideas and new directions to researchers for extending their skills in the field of composites to design innovative structural members in aerospace and automotive fields and architectural buildings, etc.
Dynamics
Offshore structures are exposed to risks of vessel collisions and impacts from dropped objects. Tubular members are extensively used in offshore construction, and thus, there is scope to investigate their crashworthiness behaviour. Aluminium, glass fibre reinforced polymer (GFRP) and hybrid aluminium/GFRP circular tube specimens were fabricated and then tested under quasi-static and dynamic axial loading conditions. Two hybrid configurations were examined: external and internal layers from respectively aluminium and GFRP, and vice versa. The material impregnated with epoxy resin woven glass fabric was allowed to cure attached to the aluminium layer to ensure interlayer bonding. The quasi-static and dynamic tests were conducted using respectively a universal testing machine at a prescribed crosshead speed of 10 mm/min, and a 78 kg drop hammer released from 2.5 m. The non-hybrid configurations (aluminium and GFRP specimens) outperformed their hybrid counterparts in terms of crashworth...
Applied Sciences-MDPI, 2020
The advantages of laminates in terms of the chemical properties and mechanical properties/weight relationship have motivated several applications of Fibre-reinforced plastic (FRP) composites in naval constructions due to the reduction in structural weight. This weight advantage has motivated multiple investigations dedicated to dissimilar material joints. We present a methodology for the interlaminar stress calculations of a tubular hybrid joint between an FRP panel and a steel panel through tubular reinforcements. The proposed formulas allow the estimation of the shear and normal stresses on the adhesive, which are generated in the bonding angle of the tubular hybrid joint. The stresses generated at the adhesive bonding ends influence on the adherent's adjacent layer. A failure criterion is shown to check the accomplishment of the resulting stresses in the adherent laminate. Finally, the proposed formulas were validated using the finite element method and compared with the obtained interlaminar stresses. This research is dedicated to analyse the interlaminar stress on the adherent's adjacent outer layer.