Analysis of nested tube type energy absorbers with different indenters and exterior constraints

Morris, Edmund; Olabi, Abdul–Ghani; Hashmi, M.S.J.

doi:10.1016/j.tws.2006.08.014

Cited by 85 publications

(34 citation statements)

References 9 publications

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“…Table 1 shows the mechanical properties of the mild steel material derived from the true stress-strain curve and used in the FE modelling. The yield stress is validated according to DIN standards, which state that the yield stress of this material is within the range of 450-525MPa [10,11].…”

Section: Materials Propertiesmentioning

confidence: 99%

“…Since the loading type was quasi-static where the loading rate was slow and there were no dynamic effects, the implicit code (ANSYS) was considered appropriate choice to model both material and geometric non-linearities of the circular tube under quasistatic lateral loading. Many researchers [10,11] used ANSYS software packages to predict the quasi-static response of the energy absorption systems. A 3D-structural solid element (solid 45) that had eight nodes with large strain, large deflection, and plasticity capabilities was used to model the tubes.…”

Section: Fe Modelmentioning

confidence: 99%

“…This value was selected due to limitation of ANSYS software in defining the softening stage in the bilinear material model, so the value was selected to be as low as possible. The same value of hardening modulus was used by [10,11] to define the softening stage of the same material. An augmented Lagrangian penalty option with a friction coefficient value of 0.2 was employed for all contact pairs.…”

Section: Fe Modelmentioning

confidence: 99%

“…The principle ways of destroying tubes include lateral compression [7][8][9][10][11], lateral indentation [12][13], axial crushing [14][15][16], tube inversion [17], and tube splitting [18].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Crush analysis and multi-objective optimization design for circular tube under quasi-static lateral loading

Baroutaji

Gilchrist

Smyth

et al. 2015

Thin-Walled Structures

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159

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Abstract:This paper addresses the energy absorption behaviour and crashworthiness optimisation of short length circular tubes under quasi-static lateral loading. Finite element (FE) models were developed using implicit FE code ANSYS to simulate the deformation behaviour and energy absorption of circular tube under lateral loading.These FE models were validated using experimental techniques to ensure that they can predict the responses of circular tube with sufficient accuracy. Response Surface Methodology (RSM) for design of experiments (DOE) was used in conjunction with finite element modelling to evaluate systematically the effects of geometrical parameters on the energy absorption responses of laterally crushed circular tubes.Statistical software package, Design-Expert, was used to apply the response surface methodology (RSM). The energy absorbing responses (specific energy absorbing capacity (SEA) and collapse load (F)) were modelled as functions of geometrical factors (tube diameter, tube thickness, and tube width). These developed functions allow predictions of the energy absorption response of laterally crushed tubes, based on their geometry parameters. Based on DOE results, parametric studies were conducted to generate design information on using the laterally crushed tubes in energy absorbing systems. Finally, the approach of multi-objective optimization design (MOD) was employed to find the optimal configuration of the proposed energy absorption structures.Design-Expert software, which employs the desirability approach as optimization algorithm, was used for solving the MOD problem.

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Section: Materials Propertiesmentioning

confidence: 99%

Section: Fe Modelmentioning

confidence: 99%

Section: Fe Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crush analysis and multi-objective optimization design for circular tube under quasi-static lateral loading

Baroutaji

Gilchrist

Smyth

et al. 2015

Thin-Walled Structures

Self Cite

159

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“…Nested tubes may be placed transversally, in inventive configurations, for crashworthy applications (Morris et al 2006(Morris et al , 2007Baroutaji et al 2016). By placing the tubes transversally, the energy absorption mechanism changes from axial crushing to a bending mechanism.…”

Section: Introductionmentioning

confidence: 99%

Axial Crushing of Concentric Expanded Metal Tubes Under Impact Loading

Graciano

Borges

Martínez

et al. 2017

Lat. Am. j. solids struct.

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This paper investigates the axial crushing response of concentric expanded metal tubes under impact loading. The study is conducted by means of nonlinear finite element simulations, considering the speed of deformation and the size of the expanded metal cells. In the analysis, two tubes are placed concentrically and then axially crushed with an impact mass at various speed levels. Crushing loaddisplacement responses are analyzed to investigate the influence of the size of the mesh and the impact speed. The results show that specimens with the same mesh sizes increases their crushing length with increasing speed. Finally the main outcome of this investigation is to add to the state of knowledge information concerning the use of expanded metal meshes in impact attenuation devices.

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Lateral collapse of short‐length sandwich tubes compressed by different indenters and exposed to external constraints

Baroutaji

Olabi

2014

Materialwissenschaft Werkst

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Abstract:In this paper, sandwich tube components which consist of thin-walled circular tubes with aluminium foam core are proposed as energy absorption systems. The sandwich tubes were laterally crushed under quasi-static loading conditions. The sandwich tubes were crushed under two types of indenters and exposed to three different types of external constraints. The collapsing behaviour and the energy absorption responses of these systems were investigated by nonlinear finite element analysis through ANSYS-LS-DYNA. Various indicators which describe the effectiveness of energy absorbing systems were used as a marker to compare the various systems. It was found that the sandwich tube systems compressed by cylindrical indenters particularly the unconstrained system (STCIU) and the system with inclined constraints (STCIIC) offered a very desirable force-deflection in which the force is almost constant in the post collapse stage. The employing of external constraints was noticed as a feasible method of increasing the SEA particularly when cylindrical indenter is used.

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Analysis of nested tube type energy absorbers with different indenters and exterior constraints

Cited by 85 publications

References 9 publications

Crush analysis and multi-objective optimization design for circular tube under quasi-static lateral loading

Crush analysis and multi-objective optimization design for circular tube under quasi-static lateral loading

Axial Crushing of Concentric Expanded Metal Tubes Under Impact Loading

Lateral collapse of short‐length sandwich tubes compressed by different indenters and exposed to external constraints

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