Numerical Analysis and Quasi-static Compression Test on Energy Absorption Structure Made of Aluminium Alloys for Railway Vehicle

Kawasaki, Takeshi; Yamaguchi, Takashi; Mochida, Toshihiko

doi:10.1299/kikaia.74.154

Cited by 3 publications

(4 citation statements)

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“…5 (b), there are some peak values of the compressive force at displacements of 11 mm, 35 mm, and 145 mm. These peak values indicate initiation of collapse of the energy-absorbing blocks and the side beam (4) . From a displacement of 145 mm to that of 400 mm, there is a cyclic fluctuation of the force and this cyclic behavior…”

Section: Resultsmentioning

confidence: 99%

“…This section describes conformation of the crashworthy structures and the experimental results of the mockup test. Since the details of the mockup tests have already been indicated in previous papers (4), (6) , essential points of the test are described here.…”

Section: Quasi-static Compression Test Using Full-scale Mockupmentioning

confidence: 99%

“…Marunaka et al have evaluated the plastic buckling behavior of columns and beams composing the crashworthy structure using FEA and a mockup test, and they designed a structure to absorb a sufficient amount of the collision energy while limiting peak value of the collapsing load (3) . Kawasaki et al have conducted mockup test and FE simulation to evaluate plastic buckling behavior and energy-absorbing properties of the crashworthy structure allocating aluminum devices specified for energy absorption beneath the floor (4) . In both studies, an elasto-plastic mechanics model was employed as constitutive equations of the materials composing the structure and equivalent plastic strain was applied for the materials fracture criterion.…”

Section: Introductionmentioning

confidence: 99%

“…In this research, numerical simulations using FEA were conducted to evaluate the energy-absorbing properties of two different types of crashworthy structures obtained from quasi-static compression tests using the mockups of the structures that have been reported in the previous research (4), (6) . Both structures consisted of welded aluminum alloys: one was composed of stiffened frame structure and thin plates (6) and the other of thin plates and energy-absorbing devices made of extruded aluminum alloy (4) . In the numerical simulation, as constitutive equations of the aluminum alloys and the welding materials, two different material models were employed: a damage-mechanics model and a conventional plastic-mechanics model based on J 2 flow theory.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of Energy Absorption of Crashworthy Structure for Railway's Rolling Stock (Numerical Simulation Applying Damage-Mechanics Model)

Kimura

Mochida

Kawasaki

et al. 2013

JMMP

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The energy absorbing ability of a crashworthy structure for a railway's rolling stock composed of welded aluminum alloys was evaluated numerically using finite element analysis (FEA). In the numerical simulation, two different material models were employed to characterize the base aluminum alloys and welding materials: one was a damage-mechanics model and the other a conventional plastic-mechanics model. The energy absorbing abilities of two different types of crashworthy structures were predicted using the FE simulations, and the numerical predictions were compared with experimental results obtained from quasi-static compression tests using mockups of these two crashworthy structures. The local phenomena (buckling and fractures) observed in the mockup tests, were also predicted numerically. The local fractures were accurately reproduced in the FE simulation employing the damage-mechanics model, while the buckling behaviors were predicted with substantial accuracy in both simulations. Comparison of the experimental results and the numerical predictions also revealed that the FE simulation applying the damage-mechanics model had an advantage in accurately predicting the energy absorption. The relationship between the local phenomena and the structural energy absorption is discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Quasi-static Compression Test Using Full-scale Mockupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Energy Absorption of Crashworthy Structure for Railway's Rolling Stock (Numerical Simulation Applying Damage-Mechanics Model)

Kimura

Mochida

Kawasaki

et al. 2013

JMMP

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Dynamic compression tests of aluminum-alloy structure for railway vehicle considering shear fracture

Nagata

Okino

Takano

2021

Transactions of the JSME (In Japanese)

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Although the number of accidents at level crossings in Japan has been decreasing annually, there is still possibility of such accidents to occur due to wrong-way entry. Therefore, it is essential to study the crashworthiness of rail vehicles in level-crossing accidents. Given that there are many possible collision scenarios for such accidents, it is useful to perform a comprehensive analysis of these scenarios. To investigate the crushing characteristics of a double-skinned aluminum-alloy car body structure for a conventional railway line, we conducted impact compression tests. The impact condition compresses the overall specimen's end face (overall compression condition) and part of its end face (local compression condition). The results of the impact compression tests were as follows. Buckling was the main cause of failure in the overall compression condition, whereas shear crushing was the main cause of failure in the local compression condition. Finite Element Method (FEM) analysis was also conducted in which several material rupture laws were used and compared with the test results. No appropriate solution could be obtained when the equivalent plastic strain was used as a threshold, whereas the results of analyses using the ESI-Wilkins-Kamoulakos (EWK) model showed good agreement with those of the experiments in both compression conditions.

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Energy absorption of crashworthy structure for rolling stock of a railway

Kimura

Mochida

Nakamura

et al. 2014

Recent Advances in Structural Integrity Analysis - Proceedings of the International Congress (APCF/SIF-2014)

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Numerical Analysis and Quasi-static Compression Test on Energy Absorption Structure Made of Aluminium Alloys for Railway Vehicle

Cited by 3 publications

References 0 publications

Evaluation of Energy Absorption of Crashworthy Structure for Railway's Rolling Stock (Numerical Simulation Applying Damage-Mechanics Model)

Evaluation of Energy Absorption of Crashworthy Structure for Railway's Rolling Stock (Numerical Simulation Applying Damage-Mechanics Model)

Dynamic compression tests of aluminum-alloy structure for railway vehicle considering shear fracture

Energy absorption of crashworthy structure for rolling stock of a railway

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