Railroad passenger car collision analysis and modifications for improved crashworthiness

Baykaşoğlu, Cengiz; Sünbüloğlu, Emin; Bozdag, S. E.; Aruk, F.; Toprak, Tuncer; Muğan, Ata

doi:10.1080/13588265.2011.566475

Cited by 55 publications

(20 citation statements)

References 11 publications

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“…Crumple zones primarily serve to slow down the collision and to absorb energy, thereby reducing the difference in speeds between the vehicle and its occupants. Complementing advances are reported elsewhere with reference to railcars design [8,29], as well as passenger cars [18,31,40] with the common theme that a safe car does not have to be rigid or has rigid structures. Despite being functional, these design approaches along with their respective and/or related resultant patents [1,4,7,9,19,21,22,23,24,37,42,43,44,46] are primarily destructive in action and simply vary in geometrical aspects, dimensional analysis, configuration, materials selection and identification-cum-location of dispensable members of the particular impact energy management system.…”

Section: Introductionmentioning

confidence: 85%

Development of granular-medium-based impact energy management system

Mwangi

Kanny

2012

International Journal of Crashworthiness

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A granular-medium-based impact energy management system has been developed. The system was subjected to low-tomedium velocity regime impacts. Effects of lubrication of granules and defaulting of boundary conditions using Bravais cubic lattice structures have been investigated. Unlike traditional design platforms where heavy reliance is placed on the intrinsic properties of materials, experimental results indicate that the new system effectively relies on the underlying synergistic mechanisms to absorb and dissipate impact energy. Dynamic simulation results validate the system's practical relevance to the automotive industry and similar contexts.

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Section: Introductionmentioning

confidence: 85%

Development of granular-medium-based impact energy management system

Mwangi

Kanny

2012

International Journal of Crashworthiness

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“…They noted that the optimal distribution of the end structural material can be obtained from the crashworthiness optimum design to ensure the maximum energy absorption of the end structure and minimize the collision deceleration. Baykasoğlu et al (2011) evaluated the structural crashworthiness of a railway vehicle after impact with a rigid barrier at 90 km/h by simulation and proposed a modified scheme to mitigate structural damage that increased the energy absorption capacity of the end structure by 13% and rendered plastic deformation more predictable. Baykasoğlu et al (2012) compared the collision characteristics of the same structures of the middle vehicles, which were composed of aluminum alloy and carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Crashworthiness Analysis of the Structure of Metro Vehicles Constructed From Typical Materials and the Lumped Parameter Model of Frontal Impact

Zhu

Xiao

et al. 2019

Transport

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This paper establishes a Finite Element (FE) model of a rigid barrier impact of a single vehicle constructed from carbon steel, stainless steel, and aluminum alloy, which are three typical materials used in metro vehicle car body structures. The different responses of the three materials during the collision are compared. According to the energy absorption, velocity, deformation and collision force flow characteristics of each vehicle, the relationship between the energy absorption ratio of the vehicle body and the energy absorption ratio of its key components is proposed. Based on the collision force flow distribution proportion of each component, the causes of the key components’ deformation are analysed in detail. The internal relationship between the deformation, energy absorption and impact force of the key components involved in a car body collision is elucidated. By determining the characteristic parameters describing the vehicle’s dynamic stiffness, a metro vehicle frontal impact model using lumped parameters is established that provides a simple and efficient conceptual design method for railway train safety design. These research results can be used to guide the design of railway trains for structural crashworthiness.

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“…11 In the field of mechanical structure, the FE models of the corrugated core sandwich panels, the child seat, the four-point contact ball bearing, the aluminum egg-box, and the railroad passenger car were also validated in the similar way mentioned above, and these models were also used to do other further researches, like improving crashworthiness. [12][13][14][15][16] According to the researches in these papers, it will be a more economical and efficient method to assess the structural safety and fatigue reliability using an FE model validated through a simple static test. Hence, a static test of the metro-train bolster was performed to validate its FE model first in this article, and then its structural safety was assessed using the Gerber diagram and a fatigue test.…”

Section: Introductionmentioning

confidence: 99%

Structural safety and fatigue reliability assessments of a metro-train bolster

Xie

Sun

et al. 2019

Advances in Mechanical Engineering

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This article presents an economical and efficient way to assess the structural safety and fatigue reliability of the bolster, a key structure for the metro-train. First, its finite element model was validated based on the comparison between numerical results and experimental data of stresses and displacements recorded during a static test. Then, the fatigue life of the bolster under loading scheme was predicted using Gerber diagram, in which the validated finite element model was applied to determine the weak points, and its structural safety was also evaluated by a full-scale fatigue test and nondestructive test method. Finally, the metro-train bolster was modeled as a series system of weak points, and a new fatigue reliability model for mechanical component derived based on stress-life interference model was used to assess its fatigue reliability under the application of the design passenger number spectra. The results show that not only does this bolster satisfy the structural safety requirement during its service life, but also its fatigue reliability is more than 99.993% after 30-year service under normal atmospheric conditions.

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Railroad passenger car collision analysis and modifications for improved crashworthiness

Cited by 55 publications

References 11 publications

Development of granular-medium-based impact energy management system

Development of granular-medium-based impact energy management system

Crashworthiness Analysis of the Structure of Metro Vehicles Constructed From Typical Materials and the Lumped Parameter Model of Frontal Impact

Structural safety and fatigue reliability assessments of a metro-train bolster

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