Crash performance and multi-objective optimization of a gradual energy-absorbing structure for subway vehicles

Xu, Ping; Yang, Chengxing; Peng, Yong; Yao, Shuguang; Zhang, Dehong; Li, Benhuai

doi:10.1016/j.ijmecsci.2016.01.001

Cited by 95 publications

(28 citation statements)

References 31 publications

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“…The use of crashworthiness optimisation techniques was not limited to finding the optimal shape of a simple TW tube but also it is expanded to include finding an optimal design of a complete part or system for automotive industry such as car door [250], car bumper beam [251], vehicle roof structures [252], vehicle front body structure [253], vehicle full body structure [247], [254]- [257], vehicle restraint system [258], vehicle side [259], frontal energy absorbing structure of subway vehicle [260], and railway vehicle driver's cab [261].…”

Section: Summary Of Optimisation Researchesmentioning

confidence: 99%

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Baroutaji

Sajjia

Olabi

2017

Thin-Walled Structures

515

135

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Over the past several decades, a noticeable amount of research efforts has been directed to minimising injuries and death to people inside a structure that is subjected to an impact loading.\ud \ud Thin-walled (TW) tubular components have been widely employed in energy absorbing structures to alleviate the detrimental effects of an impact loading during a collision event and thus enhance the crashworthiness performance of a structure.\ud \ud Comprehensive knowledge of the material properties and the structural behaviour of various TW components under various loading conditions is essential for designing an effective energy absorbing system.\ud \ud In this paper, based on a broad survey of the literature, a comprehensive overview of the recent developments in the area of crashworthiness performance of TW tubes is given with a special focus on the topics that emerged in the last ten years such as crashworthiness optimisation design and energy absorbing responses of unconventional TW components including multi-cells tubes, functionally graded thickness tubes and functionally graded foam filled tubes.\ud \ud Due to the huge number of studies that analysed and assessed the energy absorption behaviour of various TW components, this paper presents only a review of the crashworthiness behaviour of the components that can be used in vehicles structures including hollow and foam-filled TW tubes under lateral, axial, oblique and bending loading

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Section: Summary Of Optimisation Researchesmentioning

confidence: 99%

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Baroutaji

Sajjia

Olabi

2017

Thin-Walled Structures

515

135

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“…For closed structures it is interesting to focus on the effects of contact shape and geometry between the structure and the obstacle on the mean crushing force and stabilization of the crushing process. Interesting works can be found using variable thickness in the structure height (distance to the obstacle) to increase progressively the contact surface, thus avoiding any loss of contact or dynamic buckling or bundling effects [9][10][11]. The shape of the structure (polygonal) and thus of the contact also has an effect on the number of fragments and chips and on the global structure strength [12].…”

Section: Structure Effects On Initiation and Stabilization Of The Promentioning

confidence: 99%

“…with H11c = 101GPa and (9) with H22c = 9GPa and (10) In order to treat differently the elements where the continuous diffuse damage law is used or the Mean Crushing Sress law is used, and to reduce spurious oscillations in the contact force, the FFC is implemented in a user program and called as a sub-routine in the user material of Impetus Afea. The principle of the Free Face Crushing is illustrated on Figure 4.…”

Section: Mean Crushing Stress and Free Face Crushing Laws For Local Fmentioning

confidence: 99%

Stabilization of the Numerical Priming to Stabilization Phenomenon in the Crushing of a Composite Panel Using Local and Diffuse Damage Laws

Espinosa

Tostain²,

Rivallant

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…A thin-walled structure, described as a structure with thickness much smaller than the structure’s length and width, is widely used in automotive, rail transportation, aerospace, and other fields due to its high-energy absorption capacity. 1,2 When subjected to impact loads, the thin-walled structure (crush box) can absorb impact energy via plastic deformation generated by crushing itself to achieve the purpose of protecting people or goods in cars, as shown in Figure 1. 3 Conventional thin-walled structures include circular, square, elliptical, polygonal tubes, and so on.…”

Section: Introductionmentioning

confidence: 99%

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

Rakheja

Shangguan

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Thin-walled structures are widely used as energy absorbers in automotive vehicles due to their lightweight and high-energy absorption efficiency. In order to improve the energy absorption characteristics of thin-walled structures subjected to different loading angles, different types of novel multi-cell structures are proposed in this paper. The numerical method is used to study the crushing behaviors of the proposed multi-cell structures under different loading angles. It is found that the proposed multi-cell structures have considerably small initial peak force under axial load and avoid the appearance of global buckling deformation mode under oblique loads. Moreover, reasonably distributed wall thickness for each square tube in the thin-walled structure can enhance its energy absorption capacity under different loading angles.

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Crash performance and multi-objective optimization of a gradual energy-absorbing structure for subway vehicles

Cited by 95 publications

References 31 publications

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments

Stabilization of the Numerical Priming to Stabilization Phenomenon in the Crushing of a Composite Panel Using Local and Diffuse Damage Laws

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

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