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

Tran, TrongNhan; Le, DucHieu; Baroutaji, Ahmad

doi:10.1016/j.engstruct.2018.12.072

Cited by 29 publications

(11 citation statements)

References 44 publications

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“…In this article, bi-tubular structures were made of aluminium AA6061 alloy, and this material was selected owing to its wide application in vehicle body panels and roof structures [13]. Mechanical characteristics of these tubes are calculated from typical uni-axial tensile testing of samples pierced from the tubes.…”

Section: Materials and Tube Configurationmentioning

confidence: 99%

Axial Impact Crushing Performance of Bi-tubular Structures with Stiffeners

Rao

Tilekar²,

Niranjana

2019

IJITEE

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Thin-walled tube shaped components have been expansively utilized as an impact energy dissipating devices in modern vehicles in order to decrease fatalities and vehicle damage during accidents. The present article investigates the axial crushing performance of bi-tubular structures of various configurations. Nonlinear impact simulations were performed on the proposed bi-tubular structure using finite element ABAQUS/CAE explicit code. From the outcomes attained, the Energy Absorption Capability (EAC) of bi-tubular structures with stiffeners were compared and it confirmed that bi-tubular structures have more potential than that of traditional simple geometry tubes. Furthermore, bi-tubular structure of circle section enclosed with square type section were recommended as significant one for superior EAC. This kind of bi-tubular structures was found to be proficient energy absorbing elements in vehicles to improve the crashworthiness performance

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Section: Materials and Tube Configurationmentioning

confidence: 99%

Axial Impact Crushing Performance of Bi-tubular Structures with Stiffeners

Rao

Tilekar²,

Niranjana

2019

IJITEE

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“…in-walled structures are studied from simple circular, square, triangular, polygonal, and other conventional structures [2][3][4][5][6]; the deformation mode of conventional structures was studied in detail by experiment and theory. Based on these, various methods have been used to improve the mechanical properties of traditional tubes, including multi-cornered section structure [7], corrugated tubes [8][9][10], multi-cell structure [11], nested tubular structures [12][13][14], filling tubes with foam [15,16], honeycomb structure based on bionic design [17][18][19][20], and variable thickness design [21][22][23][24]. However, in the process of improving the performance, the deformation mode of some structures is unstable, which does not make the maximum energy absorption efficiency of the material.…”

Section: Introductionmentioning

confidence: 99%

Crashworthiness Analysis and Multi-Objective Optimisation of Multi-Cell Windowed Structures under Dynamic Impact Loading

Chen

Liang

et al. 2022

Shock and Vibration

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Applying a windowed design in a thin-walled structure is a method to further enhance the crashworthiness of the structure. In this study, two kinds of windowed designs were introduced into different regions of a multi-cell energy absorption structure to form a multi-cell windowed structure, and its crashworthiness under dynamic impact was studied. Dynamic impact testing and LS-DYNA finite element modelling were combined to calculate the crashworthiness response of the structure. The simulation results show that the use of the windowed multi-cell structure can improve the crashworthiness response of the multi-cell structure. The influence of the windowed design on the structural deformation mode was analysed in detail. In addition, the multi-objective optimization design of different windowed structures was carried out to obtain a comprehensive crashworthiness evaluation, and the results show that the windowed design at the front end of the structure yields good results regarding the initial peak force (PCF), while the windowed design in the middle of the structure can effectively improve the specific energy absorption (SEA) and energy absorption (EA).

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“…The advances in the automotive industry necessitate developing lightweight and highly efficient energy absorption components to provide the required safety for modern vehicles. Thus, innovative versions of thin-walled structures with more sophisticated shapes and material started to be used as energy absorption structures such as functionally graded thickness [12][13][14][15], foam-filled [16,17], nested [10,18,19], corrugated [20], and multi-cell structures [19,[21][22][23]. Functionally graded thickness (FGT) tubes are attractive structures with a non-uniform material distribution allowing for enhanced crashworthiness performance without increasing weight.…”

Section: Introductionmentioning

confidence: 99%

Deformation and energy absorption of additively manufactured functionally graded thickness thin-walled circular tubes under lateral crushing

Baroutaji

Arjunan

Stanford

et al. 2021

Engineering Structures

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Functionally graded thickness (FGT) is an innovative concept to create light-weight structures with better material distribution and promising energy absorption characteristics suitable for vehicle crashworthiness applications. Accordingly, this paper suggests innovative circular tubes with inplane thickness gradient along their perimeter and assesses their crashworthiness behaviour under lateral loading. Three different designs of circular tubes with thickness gradient were considered in which the locations of maximum and minimum thicknesses are varied. Selective laser melting method of additive manufacturing was used to manufacture the different tubes. Two different bulk powders including titanium (Ti6Al4V) and aluminium (AlSi10Mg) were used in the manufacturing process. Quasi-static crush experiments were conducted on the laser melted tubes to investigate their crushing and energy absorption behaviour. The energy absorption characteristics of the different FGT tubes were calculated and compared against a uniform thickness design. The results revealed that the best crashworthiness metrics were offered by FGT titanium tube in which the maximum thickness regions were along the horizontal and vertical directions while the minimum thickness regions were at an angle of 45 o with respect to the loading direction. The aforementioned tube was found to absorb 79% greater energy per unit mass than its uniform thickness counterpart.Finally, with the aid of numerical simulations and surrogate modelling techniques, multi-objective optimisation and parametric analysis were conducted on the best FGT tube. The influences of the geometrical parameters on the crashworthiness responses of the best FGT structure were explored and the optimal thickness gradient parameters were determined. The results reported in this paper provide valuable guidance on the design of FGT energy absorption tubes for lateral deformation.

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

Cited by 29 publications

References 44 publications

Axial Impact Crushing Performance of Bi-tubular Structures with Stiffeners

Axial Impact Crushing Performance of Bi-tubular Structures with Stiffeners

Crashworthiness Analysis and Multi-Objective Optimisation of Multi-Cell Windowed Structures under Dynamic Impact Loading

Deformation and energy absorption of additively manufactured functionally graded thickness thin-walled circular tubes under lateral crushing

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