Effect of energy-absorbing materials on the mechanical behaviour of hybrid FRP honeycomb core sandwich composites

Nowadays, pultruded glass fiber-reinforced polymer composite (PGFRPC) structures have been used widely for cross-arms in high transmission towers. These composite structures have replaced cross-arms of conventional materials like wood due to several factors, such as better strength, superior resistance to environmental degradation, reduced weight, and comparatively cheaper maintenance. However, lately, several performance failures have been found on existing cross-arm members, caused by moisture, temperature changes in the atmosphere, and other environmental factors, which may lead to a complete failure or reduced service life. As a potential solution for this problem, enhancing PGFRPC with honeycomb-filled composite structures will become a possible alternative that can sustain a longer service life compared to that of existing cross-arms. This is due to the new composite structures’ superior performance under mechanical duress in providing better stiffness, excellence in flexural characteristics, good energy absorption, and increased load-carrying capacity. Although there has been a lack of previous research done on the enhancement of existing composite cross-arms in applications for high transmission towers, several studies on the enhancement of hollow beams and tubes have been done. This paper provides a state-of-the-art review study on the mechanical efficiency of both PGFRPC structures and honeycomb-filled composite sandwich structures in experimental and analytical terms.

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“…Flexural stiffness properties of FRP/GFRP beams/panels with different core-filled structures[31,163,164].…”

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confidence: 99%

Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties

et al. 2021

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“…Based on the experimental values from the tensile and flexural tests of FS, the strength is calculated by using equations ( 1) and (2). 33 Tensile Strength of FS ¼ Maximum load=Cross sec tional area (1) where F denotes the applied load at the deflection point, L denotes the span length, and d and b denote the specimen thickness and breadth, respectively. Similarly, the edgewise compression and flexural strength (with a span length of 180 mm) of the prepared whole honeycomb sandwich panel were measured by Lloyd UTM following ASTM standards like C-364 and C-393, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Based on the experimental values from the flexural test, the stresses are calculated by using equations ( 3)-( 6). 33 Flexural Strength of SP ¼ 3PL 2bd 2 (3)…”

Section: Methodsmentioning

confidence: 99%

“…Based on the experimental values from the tensile and flexural tests of FS, the strength is calculated by using equations (1) and (2). 33 where F denotes the applied load at the deflection point, L denotes the span length, and d and b denote the specimen thickness and breadth, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Based on the experimental values from the flexural test, the stresses are calculated by using equations (3)–(6). 33 where P is the maximum load before failure, b is the sandwich panel width, and d and c represent the thickness of the sandwich panel and core, respectively. Deflection w, L, and t are the span length and thickness of the face sheet, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Study of matrix modifications by nano-clay on the mechanical properties of AA3003 honeycomb sandwich panels

Prasanth

Raj

Jappes

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Face/core debonding is one of the crucial problems of composite sandwich panels which consist of AA3003 aluminium honeycomb and glass fiber reinforced polymer face sheets. The panel was prepared by a hand-lay process at different nano-clay weight addition of 0%, 2%, 4%, and 6% with the objective of improving face/core adhesion. Interface bonding between face sheets and honeycomb core composite sandwiches and their mechanical behavior were investigated under in-plane compression and bending load. The flexural property of sandwich panels due to the influence of variation in strain rate is further determined. The morphologies of fractured samples were investigated by scanning electron microscope (SEM). The results revealed a significant improvement in mechanical characteristics when nano-clay was loaded to the composites at a concentration from 2 to 4 wt%, and the in-plane compression and flexural failure load values increased by 45% and 81%, respectively, when compared to a pristine sample. It was observed that increasing strain rate led to the increase in failure load of the sandwich panel. SEM images of fractured surfaces showed residual aluminium honeycomb was present in the face sheet, which indicates better adhesion between aluminium honeycomb core and face sheets.

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3D-Printed Spherical-Roof Contoured-Core (SRCC) Composite Sandwich Structures for Aerospace Applications

Rejab

Hanon

et al. 2021

Composites Science and Technology

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Effect of energy-absorbing materials on the mechanical behaviour of hybrid FRP honeycomb core sandwich composites

Cited by 13 publications

References 32 publications

Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties

Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties

Study of matrix modifications by nano-clay on the mechanical properties of AA3003 honeycomb sandwich panels

3D-Printed Spherical-Roof Contoured-Core (SRCC) Composite Sandwich Structures for Aerospace Applications

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