Crashworthiness of tapered thin-walled S-shaped structures

Beik, Varshan; Fard, Mohammad; Jazar, Reza N.

doi:10.1016/j.tws.2016.01.013

Cited by 18 publications

(1 citation statement)

References 18 publications

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“…Finite element (FE) method is now the most popular CAE method for the crashworthiness research of the thin-walled structures. And, a lot of researchers had done a lot of work to investigate the energy absorptions of thin-walled structures using FE method [14][15][16]. Langseth and Hopperstad [10] investigated the square thin-walled tubes under axial crushing using FE simulation through LS-DYNA (version 970).…”

Section: Introductionmentioning

confidence: 99%

Theoretical prediction and crashworthiness optimization of multi-cell polygonal tubes

Yin

Wen

Bai

et al. 2017

Jnl of Sandwich Structures & Materials

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Multi-cell polygonal tubes are highly efficient energy absorbers and widely used in vehicle engineering. There is no doubt that the structure designers have strong interest to know which kind of multi-cell polygonal tube has the best crashworthiness. However, the comparative study on the crashworthiness of multi-cell polygonal tubes with different edges was quite few. In this paper, the multi-cell polygonal single and bitubular tubes were investigated using the numerical simulation and theoretical prediction methods. Theoretical expressions of the mean crushing forces of the multi-cell polygonal single and bitubular tubes with arbitrary edge were derived by employing the simplified super folding element theory. The theoretical predictions well coincided with the numerical results. Based on the theoretical and numerical results, it can be found that the multi-cell polygonal bitubular tube with 18 edges had the best energy absorption capacity. In order to further improve the crashworthiness of multi-cell polygonal tube, a metamodel-based multi-objective optimization method which jointly employed the finite element simulation, metamodelling method and non-dominated sorting genetic algorithm ver. II multi-objective optimization algorithm was developed. Based on this metamodel-based optimization method, the multi-cell polygonal bitubular tube with 18 edges was optimized. The theoretical prediction also had good agreement with the numerical simulation result for the optimal design. The optimal multi-cell polygonal tube not only had excellent energy absorption capacity but also had stable collapse mode.

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Section: Introductionmentioning

confidence: 99%

Theoretical prediction and crashworthiness optimization of multi-cell polygonal tubes

Yin

Wen

Bai

et al. 2017

Jnl of Sandwich Structures & Materials

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Hybridization effect on energy absorption capacity of composite crash boxes

Erkek,

Kosedag,

Adin

2024

Polymer Composites

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Crash boxes are safety elements generally made of metallic materials and mounted on the chassis of vehicles to prevent possible injuries to driver and passengers by absorbing the energy generated during a collision and ensuring integrity of vehicle. In order to save fuel and reduce harmful gases released into the environment, the proportion of metallic materials used in vehicles is decreasing and being replaced by composite materials. While composite materials are as durable as metallic materials, they are preferred because they are lighter. In this study, circular composites consisting of glass (S1), aramid (S2), carbon (S3), and hybrid combinations of aramid‐carbon‐glass (S4), carbon‐glass‐aramid (S5), and glass‐aramid‐carbon (S6), all with epoxy resin matrices, were produced using the vacuum infusion method and investigated. Crush parameters, maximum peak loads and specific energy absorption of hybrid tubes with different fiber types and winding order were compared. S3 tube had the best energy absorption performance among all samples of 257.288 Joules, while the worst energy absorption performance was obtained for S2 tube with 30.944 Joules. Among the hybrid samples, the best result was determined as 166.50 Joule with hybrid S5. Although the energy absorption capacities of hybrid composite tubes were close to each other, they had lower results for energy absorption and specific energy absorption than S1 and S3. For specific energy absorption, as with energy absorption, the best result was obtained with S3, while the lowest result was obtained with S2.Highlights The aim of this study is to evaluate the performance of composite crash boxes. The effect of fiber type and hybridization was examined. Specific energy absorptions and maximum contact forces were compared. Cylindrical samples were produced by vacuum infusion. The variation of damage depending on fiber type was investigated.

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Influence of Invertube’s Thickness on Crash Energy Absorption

Mahesh

Narayanamurthy

2022

Recent Advances in Applied Mechanics

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Crashworthiness of tapered thin-walled S-shaped structures

Cited by 18 publications

References 18 publications

Theoretical prediction and crashworthiness optimization of multi-cell polygonal tubes

Theoretical prediction and crashworthiness optimization of multi-cell polygonal tubes

Hybridization effect on energy absorption capacity of composite crash boxes

Influence of Invertube’s Thickness on Crash Energy Absorption

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