Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

Fomin, Oleksij; Gorbunov, Mykola; Lovska, Alyona; Gerlici, Juraj; Kravchenko, Kateryna

doi:10.3390/ma14081915

Cited by 24 publications

(17 citation statements)

References 28 publications

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“…19–21 The experimental results show that the crushing behavior of foam-filled mixed structure is obviously improved comparing with that of empty hybrid structure, and the crushing resistant behavior of foam-filled hybrid tubes is positively related to the situation of the adding material. 22–24 The results also revealed that the peak force is improved by using the aluminum alloy foam inside the composites. 25,26 During an impact accident, the thin-walled structures in the automobile may play a key role in protecting passengers, and thus a lot of research has been done on foam filling materials.…”

Section: Introductionmentioning

confidence: 87%

Numerical study on energy absorption characteristics of bio-mimetic multi-cell thin-walled structures with different hierarchy

Hao

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Horsetail plant is the most primitive terrestrial plant bred by spores. After hundreds of millions of years of evolution, the internal structure of horsetail plant stem is composed of multiple cavity which brings excellent impact resistance. The investigation of the internal thin-walled structure of horsetail plant can be used to improve the energy absorption property of the existing thin-walled structure, and has important significance and application potential for the design of anti-collision structure. In this study, four kinds of bio-mimetic thin-walled models with different shapes of cross-sections were proposed and established based on the horsetail plants, and the energy absorption values of the structures were calculated and analyzed by numerical method. The squ-3rd structure with the highest specific energy absorption value of 49.121 kJ/kg was obtained. Then the specific energy absorption value and crushing force efficiency of the structure under different parameters, including wall thickness, side length height ratio, and impact angle were calculated and discussed. Based on the numerical simulation results, we found that for the third-order form of structure with square cross-section, the structure with the wall thickness between 1 and 1.25 mm showed better crushing resistance. And, the energy absorption characteristics of the structure were found to have better performance when the side length height ratio is 1:1.

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Section: Introductionmentioning

confidence: 87%

Numerical study on energy absorption characteristics of bio-mimetic multi-cell thin-walled structures with different hierarchy

Hao

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Similar trends can be seen in the railway transportation and construction industries. For example, the development of "aluminum" light passenger carriages increases train movement on the railway line by up to two times [7,8]. Furthermore, it is well known that the use of aluminum structures in construction contributes to a significant reduction in the load on the foundation when high-rise buildings and other large-scale structures are built.…”

Section: The Merits and Advantages Of Aluminum And Aluminum-based Alloysmentioning

confidence: 99%

Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Sakhvadze¹,

Janelidze

Mikadze

2022

Metall Mater Eng

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Based on a critical analysis of the current state and prospects of development of the problem of pyrometallurgical recovery/extraction of aluminum from aluminum-bearing industrial waste, the need to replace traditional, electrocarbonothermic processes and melting process units with innovative, plasma carbothermal processes and furnace-reactors, with the possibility of reverse feeding and recovery of gasified during melting metal and metal oxide components is substantiated. On the basis of this analysis a new technological scheme of smelting with a new design of plasma-arc furnace-reactor, which provides a solution to the problem using a special hollow double-shell graphite cathode connected to the system of circulating supply of gases separated from the reaction zone, was developed and presented. The proposed technological scheme also differs in the use of such highly active liquid and gaseous reagents as carbon-containing reducing agents as calcium carbide (CaC2) and methane (CH4). The main features of chemism of reducing processes are described. It is shown that by replacing traditional coke with anodized calcium carbide and natural gas (methane) the recovery rate of aluminum oxide (Al 29-34%) and silica (SiO2) and hematite (Fe2O3) present with it increases to 80-99%. Specific power consumption is reduced by 35-40%, the 90-95% reduction in the loss of target elements, the 80% reduction in the emission of greenhouse carbon dioxide, which is replaced by a very valuable recyclable synthesis gas - CO-H2. By additionally feeding separate portions of quartzite and steel-rolling scale in the furnace-reactor, a complex alloy-ligature of Fe-Si-Al-Ca system is melted, with the ratio of components: 1:[1.3-2]:[1.3-1.2]:[0.9-1.25]. With the introduction into industrial practice of the plasma carbothermal process of aluminum reduction from secondary aluminum dumping slags accumulated in the world (4 million tons/year), it will be possible to return up to 1-1.5 million tons/year of aluminum to the production processing cycle.

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“…The authors of [14,15] make improvements to the load-bearing structures of freight cars to reduce their dynamic load under operational modes. The set goal is achieved by using a material with energy-absorbing properties for the load-bearing structures of freight cars containing round cross-section pipes.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The above review of literary sources [9][10][11][12][13][14][15][16][17][18] allows us to conclude that the issue related to reducing the load on the bearing structure of a covered freight car under operational load modes requires further research and development.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Defining patterns in the dynamic load and strength of the bearing structure of a covered freight car with a filler in the girder beam

Panchenko

Fomin

Vatulia

et al. 2021

EEJET

Self Cite

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This paper reports a study into determining the dynamic load and strength of the bearing structure of a covered freight car under operational modes. A feature of the freight car's bearing structure is that the girder beam has a closed cross-section. To reduce the dynamic load of the frame, the girder beam is filled with a material with viscoelastic properties. Such a solution could contribute to the transformation of the kinetic energy of impact (due to jerk, stretching, compression) into work of viscoelastic friction forces, and, consequently, to reducing the load on the bearing structure. To substantiate the proposed improvement, the dynamic load on the bearing structure of a covered freight car was mathematically modeled. The calculation was performed for the case of joint impacts at shunting. The study was carried out in a flat coordinate system. It was established that the maximum accelerations acting on the bearing structure of a covered freight car were about 37 m/s2. The calculated acceleration value is 3.2 % lower than that obtained for the bearing structure of a covered freight car without filler. The results of calculating the strength of the load-bearing structure of a covered freight car are given. In this case, a finite-element method was applied. The maximum equivalent stresses occur in the zones of interaction between the girder beam and the pivot beams, and amount to 319.5 MPa, which is 8 % lower than permissible. The calculation was also performed regarding other operational modes of loading the freight car's bearing structure. The model of the dynamic load on the bearing structure of a covered freight car was verified according to the F-criterion. The research reported here could contribute to designing innovative rolling stock structures, thereby improving the efficiency of their operation.

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Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

Cited by 24 publications

References 28 publications

Numerical study on energy absorption characteristics of bio-mimetic multi-cell thin-walled structures with different hierarchy

Numerical study on energy absorption characteristics of bio-mimetic multi-cell thin-walled structures with different hierarchy

Development and investigation of the technological process of plasma carbothermal reduction of slag from secondary metallurgy of aluminum

Defining patterns in the dynamic load and strength of the bearing structure of a covered freight car with a filler in the girder beam

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