Hybrid Body of Underground Railway Car: Path Towards Reduced Weight of Rail Vehicles

Heller, P. R.; Korinek, Jiri; Triska, Ladislav

doi:10.17973/mmsj.2015_10_201514

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Heller et al, 58 in a project sponsored by the Czech Ministry of Industry and Trade, introduced a hybrid car body for the underground train which consists of various materials and structures. Hybridizing GFRP sandwich panels and metallic parts in the car body resulted in a 19% weight reduction compared to the metallic car body shells.…”

Section: Applications Of Frps In Railway Vehiclesmentioning

confidence: 99%

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Recent advancements in the applications of fiber‐reinforced polymer structures in railway industry—A review

Saeedi,

Motavalli,

Shahverdi

2023

Polymer Composites

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The application of fiber‐reinforced polymer (FRP) composite materials and structures in various industrial sectors is expanding significantly to meet the rising demand for efficient, reliable, and functional building materials. Using FRPs can be an excellent strategy for enhancing railway structures and equipment because of their high strength‐to‐weight ratio, tailorable mechanical properties, and suitable long‐term characteristics. However, the railway industry appears to be hesitant to adopt composite materials compared to other transportation sectors like aerospace. It seems that there is still a long way to go before FRPs reach their full potential in railway applications. The goal of the current study is to explore the current uses of FRPs in the railway industry and the significant challenges, obstacles and difficulties that must be overcome to put FRP‐based concepts into practice for structural and rail vehicle applications.Highlights Applications of FRPs in railway vehicles and rail lines are reviewed. Main challenges for utilization of FRP in railway industry are studied. Future trends and applications of FRPs in the railway sector are introduced.

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Section: Applications Of Frps In Railway Vehiclesmentioning

confidence: 99%

“…Heller et al, 58 in a project sponsored by the Czech Ministry of Industry and Trade, introduced a hybrid car body…”

Section: Hybrid Frp-metal Car Bodiesmentioning

confidence: 99%

Recent advancements in the applications of fiber‐reinforced polymer structures in railway industry—A review

Saeedi,

Motavalli,

Shahverdi

2023

Polymer Composites

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“…[52] Heller et al manufactured railway vehicle sidewall and ceiling panels using GFRP sandwich composites, and the results showed that a total weight loss of around 20% was achieved in the vehicle compared to sidewall and ceiling panels produced from conventional stainless steel. [53] Khalil used E-glass fiber, iron slag and plastic wastes (polyethylene, polyester and styrene) for manufacturing a novel composite laminate. Based on the mechanical results obtained it was confined that the prepared composites met the necessary international standards to be used in railway sleepers.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber reinforced areca/sisal hybrid composites for railway interior applications: Mechanical and morphological properties

et al. 2021

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The present experimental investigation focuses on the development of Areca/ Sisal/Carbon reinforced epoxy hybrid composites under various stacking sequences and involves the assessment of their mechanical and morphological properties to evaluate their use in some railway interior applications. Nine different combinations of laminates were prepared by using the manual hand layup technique. Mechanical experiments such as tensile, flexural, impact, inter-laminar shear strength and hardness tests were performed and the results envied the positive values which suggest the use of composites prepared in the study to be employed in some railway interior parts. The morphology of the composites was scrutinized using scanning electron microscopy and exposed the proper agglomeration of fibers in the matrix which in turn has influenced better mechanical properties. The experimental results convey that the hybridization of natural and synthetic fibers in polymer matrix would be an exciting prospect to be utilized in some railway interior applications.

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“…2 Heller et al manufactured a hybrid body railway vehicle using GFRP sandwich composites for both sidewall and ceiling panels, achieving a mass reduction of almost 20% in comparison with a traditional stainless steel body. 9 Similarly, CG Rail recently produced a rail vehicle made in large part (around 70%) of composite components, developing a manufacturing process capable of producing large carbon fibre-reinforced polymer (CFRP) profiles with a wall thickness up to 25 mm. The total mass reduction in comparison with an aluminium car body vehicle is almost 30%, due to a 90% CFRP content in main large structures such as front cab and under-floor panelling.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic polyurethane composites for railway applications: Experimental and numerical study of hybrid laminates with improved impact resistance

Rizzo

Pinto

Meo

2019

Journal of Thermoplastic Composite Materials

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Due to the introduction of highly restrictive safety and pollution legislations in the railway industry, weight reduction has become an increasingly important topic over the last decade. Carbon fibre-reinforced polymers (CFRPs) constitute an excellent alternative to traditional materials, due to their highly specific in-plane mechanical properties. Their use in railway industry, however, is currently hindered by their weak out-of-plane properties. Bogies and underframes are often subjected to impact loadings caused by objects and debris surrounding the tracks (i.e. ice, ballast) that become airborne during the train transit and impact lower part of the carriage. While metal structures absorb impact energy via plastic deformation, barely visible impact damage can occur in CFRP, weakening the component, and often leading to catastrophic failures. This work proposes a method for the improvement of impact absorption performance of railway composite structures via the addition of a thermoplastic polyurethane (TPU) coating to CFRP laminates. The thermomechanical behaviour of the thermoplastic layer was investigated with dynamic mechanical analysis and differential scanning calorimetry analysis to optimize the manufacturing process, while damping tests were carried out to demonstrate its unaltered energy absorption ability in the final manufactured structure. TPU/CFRP plates (150 × 100 mm2 of in-plane size) were subjected to 2, 3 and 5 J impacts, and the results were compared with those of traditional CFRP laminates. Non-destructive test (NDT; i.e. C-scan, phased array) and compression-after-impact test were carried out on the impacted samples to assess the damaged area and residual in-plane mechanical properties. Results show that the TPU layer modifies the energy absorption mechanism, preventing the propagation of damage within the CFRP and resulting in undamaged samples even at the highest energy. To predict the TPU/CFRP impact behaviour and identify the best process parameters to optimize impact energy absorption, a finite element model was developed and validated using experimental data. The comparison showed good correlation, and a fine approximation of the different impact mechanisms was observed with a maximum error of 5% between experimental and simulated output values. The experimental and numerical results show that the TPU/CFRP laminates constitute a novel solution for the manufacturing of lighter and safer railway composite structures.

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Hybrid Body of Underground Railway Car: Path Towards Reduced Weight of Rail Vehicles

Cited by 5 publications

References 1 publication

Recent advancements in the applications of fiber‐reinforced polymer structures in railway industry—A review

Recent advancements in the applications of fiber‐reinforced polymer structures in railway industry—A review

Carbon fiber reinforced areca/sisal hybrid composites for railway interior applications: Mechanical and morphological properties

Thermoplastic polyurethane composites for railway applications: Experimental and numerical study of hybrid laminates with improved impact resistance

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