A novel tailor-made technique for enhancing the crashworthiness by multi-stage tubular square tubes

Zahran, M. S.; Xue, Pu; Esa, Moustafa; Abdelwahab, Mostafa

doi:10.1016/j.tws.2017.09.031

Cited by 50 publications

(26 citation statements)

References 64 publications

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“…The calculated λ was found to be 1.2, 1.22, and 1.03 for TSST, MNST2, and MNST3, respectively. These values for λ are in agreement with those reported in [36].…”

supporting

confidence: 92%

“…The final score and ranking of each structure obtained via TOPSIS method are presented in the Tables Table 1. Mechanical properties of Aluminium alloy AA6061-O [36] Modulus…”

Section: Further Discussion and Evaluation Of Energy Absorption Charamentioning

confidence: 99%

“…Najafi and Rais-Rohani [31] expanded the super folding element theory [34] and an analytical solution of collapse response for a multi-corner tube under axial loading was proposed. Hanssen et al [35] which was presented by Zahran et al [36], were also calculated in this paper. All structures have the same weight and their geometrical parameters are presented in Table 2.…”

mentioning

confidence: 82%

“…To further validate the theoretical model, the result obtained from the theoretical solution is compared with that obtained from experiment reported in [36]. The force-displacement response and crushing behaviour of MSSQ is shown in Fig.…”

Section: Validation Of Theoretical Relationsmentioning

confidence: 94%

See 3 more Smart Citations

Theoretical and numerical crush analysis of multi-stage nested aluminium alloy tubular structures under axial impact loading

Tran

Baroutaji

2019

Engineering Structures

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“…The calculated λ was found to be 1.2, 1.22, and 1.03 for TSST, MNST2, and MNST3, respectively. These values for λ are in agreement with those reported in [36].…”

supporting

confidence: 92%

“…The final score and ranking of each structure obtained via TOPSIS method are presented in the Tables Table 1. Mechanical properties of Aluminium alloy AA6061-O [36] Modulus…”

Section: Further Discussion and Evaluation Of Energy Absorption Charamentioning

confidence: 99%

mentioning

confidence: 82%

Section: Validation Of Theoretical Relationsmentioning

confidence: 94%

See 2 more Smart Citations

Theoretical and numerical crush analysis of multi-stage nested aluminium alloy tubular structures under axial impact loading

Tran

Baroutaji

2019

Engineering Structures

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show abstract

“…The friction coefficients of the dynamic and static are set as 0.2 and 0.3, respectively [27]. The material of specimens is aluminum alloy A6061-O with properties [37] listed in Table 2. The specimen is represented by a piecewise linear plastic strain hardening material (MAT_24).…”

Section: Fe Models and Validationmentioning

confidence: 99%

Crashworthiness Optimization Design of Aluminum Alloy Thin-Walled Triangle Column Based on Bioinspired Strategy

Feng

Gao

et al. 2020

Materials

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Aluminum alloy thin-walled structures have been well used in applications of energy absorption. In the present work, a bioinspired design strategy for aluminum alloy thin-walled structures is proposed to improve the performance of out-of-plane crashworthiness by altering the material distribution. According to the proposed strategy, a novel fractal thin-walled triangle column (FTTC) is designed, which is composed by iteratively applying the affine transformation of a base triangle up to 2nd-order. The finite element model is established to investigate the out-of-plane crashworthiness of FTTC and validated by experiment results. The numerical analysis of the crashworthiness of FTTC with different fractal orders (0th, 1st and 2nd) are performed, and the results show that 1st- and 2nd-order FTTC enhance the energy absorption of structures and crush force efficiency. In particular, 2nd-order FTTC has better energy absorption ability due to the optimal distribution of materials, which are efficiently organized by the proposed bioinspired design strategy. In addition, a parameter study is performed to investigate the effect of FTTC geometric details on the crushing procedure. The collapse mode shows that it tends to change from unstable to stable with the increase in thickness and side length and the decrease in height. Moreover, a positive relevant relationship is identified between the thickness and the crashworthiness for FTTC.

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4D Metamaterials with Zero Poisson's Ratio, Shape Recovery, and Energy Absorption Features

Hamzehei

Serjouei

et al. 2022

Adv Eng Mater

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Crashworthiness is the ability of the materials or structures to absorb impact energy through plastic deformations, friction, fracture, shear, bending, and even torsion. [1] Energy absorbers have been extensively used for different applications. The most prevalent applications can be found in the automotive, railway, and aerospace industries. [2,3] It is important to reduce the mortality rate caused by car crashes in the automotive industry. When it comes to passengers' safety, some critical crashworthy elements must be considered to design proper energy absorbers. The most vital item could be the initial reaction force caused by hitting an external object. [4] The lower the initial reaction force, the safer the occupants might be. A vehicle contains structural elements like rockers, pillars, and bumpers. Among these elements, the front bumper plays a vital role when it comes to energy absorption and is the most effective parameter for vehicle safety and occupants. The front bumper usually absorbs more than half of the kinetic energy during a car crash. [4] This is the main reason for magnifying the existence of high-performance energy absorbers Distinct from the initial reaction force, the crashworthy designers have been considering various main criteria for an ideal energy absorber, including high energy absorption performance, stability, and safety. Consequently, some design approaches such as gradual energy absorption (GEA), piecemeal energy absorption (PEA), and conventional energy absorption (CEA) have been proposed. [5][6][7] The absorbers designed based on the PEA and GEA approaches show different peak force levels in force-displacement relation, whereas the CEA-based absorbers show a peak force level in their forcedisplacement relation. Xu et al. [5] proposed a structure exhibiting the GEA for subway vehicles. The proposed energy absorber exhibits multistiffness behavior under the impact, showing different peak force levels as well. Afterward, the concept of piecemeal energy absorption (PEA) was introduced by Esa et al. [6] . The PEA concept is similar to the GEA concept. Due to the flexibility of the PEA concept over the GEA, this concept is extended to diverse applications. The PEA strategy provides lower damages under low-velocity impact and higher energy absorption capacity under high-velocity impact. Apart from the GEA and PEA concepts, most energy absorbers possess a CEA response. [7] The CEA response means a gradual increase in initial reaction forces under the impact and then the fluctuations in crushing forces are caused by overcoming the energy absorber's yield strength.

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A novel tailor-made technique for enhancing the crashworthiness by multi-stage tubular square tubes

Cited by 50 publications

References 64 publications

Theoretical and numerical crush analysis of multi-stage nested aluminium alloy tubular structures under axial impact loading

Theoretical and numerical crush analysis of multi-stage nested aluminium alloy tubular structures under axial impact loading

Crashworthiness Optimization Design of Aluminum Alloy Thin-Walled Triangle Column Based on Bioinspired Strategy

4D Metamaterials with Zero Poisson's Ratio, Shape Recovery, and Energy Absorption Features

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