An experimental investigation on energy absorption of thin-walled bitubal structures by inversion and axial collapse

Jafarian, Behnam; Rezvani, Mohammad Javad

doi:10.1016/j.ijmecsci.2017.03.005

Cited by 28 publications

(5 citation statements)

References 25 publications

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“…Axisymmetric bending of the long tube was also prevented by introducing grooves in the tubes and controlling the sudden force among the tubes. The external grooves control and stabilize the collapse of tubes [11]. Finally, it was discovered that grooves cause the production of concertina mode, which is followed by diamond mode following the construction of two rings, and that grooved specimens are significantly superior to groove-less ones.…”

Section: Grooved Circular Tubesmentioning

confidence: 99%

“…The process of external and internal inversion is important in terms of energy absorption and specific energy absorption. When different geometries are assumed in a bi-tubular system, the internal tube is pressed through the inner folds of the square cross-section by the external [11]. In the axial deformation of internal tubes, this is a critical factor.…”

Section: Bi-tubular Structurementioning

confidence: 99%

See 1 more Smart Citation

The Crashworthiness Performance of Thin-Walled Energy Absorbing Devices: An Overview

Baghel¹,

Tak²,

Swami³

et al. 2023

SCRS Proceedings of International Conference of Undergraduate Students

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Over the past many decades, numerous research efforts have been directed to overcome the major challenge of automotive and aeronautical industries to design lightweight and crash-worthy vehicles that are subjected to impact loading. The energy absorbers are provided in the automobiles and aircraft to minimize the damage to occupants and main structural part of vehicle itself. Many energy-absorbing devices could be appropriately designed for the transport vehicles, however, the thin-walled tubular structures have been widely employed to reduce the destructive effects of dynamic impact loading during a collision and thus increase the crashworthiness behavior of the structural frame. A comprehensive knowledge of the structural performance and material properties of various thin-walled structures under different dynamic loading conditions is important for designing a perfect energy-absorbing device. In this paper, based on a detailed literature survey, a comprehensive overview of the recent investigations in the area of crashworthiness behavior of thin-walled tubes is specified on the topics that appeared in the last decade such as optimization for crashworthiness and energy absorbing performance of unconventional thin-walled components including functionally graded thickness tubes and multi-cell tubes. Due to a large number of studies that analyzed and evaluated the energy absorption behavior of various thin wall structures, this paper presents only an overview on crashworthiness response of the structural components that can be used in vehicular structures including multi-cell thin-walled tubes under axial, oblique and bending loading.

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Section: Grooved Circular Tubesmentioning

confidence: 99%

Section: Bi-tubular Structurementioning

confidence: 99%

The Crashworthiness Performance of Thin-Walled Energy Absorbing Devices: An Overview

Baghel¹,

Tak²,

Swami³

et al. 2023

SCRS Proceedings of International Conference of Undergraduate Students

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“…Experimental results analysed by Karagiozova et al [15] show influence of foam strength and density to quasi-static and dynamic responses. Jafarian and Rezvani [16] showed that increasing of absorption power can be realized by bitubal structures filled by PU foam as well as the shrinking of tubes. The impacts of foam core to shape of deformation and values of crushing force by using squared aluminium columns filled by PU foam were studied by Dirgantara et al [17].…”

Section: Introductionmentioning

confidence: 99%

“…Results obtained by FE model (quasi-static and dynamic analyses of tapered tube with rectangular cross section with casted PU foam inside their) showed that the foam density has no crucial influence on the initial peak of force; while the other parameters (absorber energy and deformation resistance) increase with rise density of foam, were presented by Mirfendereski et al 14 Experimental results analysed by Karagiozova et al 15 show influence of foam strength and density to quasi-static and dynamic responses. Jafarian and Rezvani 16 showed that increasing of absorption power can be realized by bitubal structures filled by PU foam as well as the shrinking of tubes. The impacts of foam core to shape of deformation and values of crushing force by using squared aluminium columns filled by PU foam were studied by Dirgantara et al 17 Darvizeh et al 18 found that circumferentially grooved thickwalled tubes filled by PU foam can absorb for about 26% higher collision energy in comparison with empty one.…”

Section: Introductionmentioning

confidence: 99%

Experimental research of absorption properties of rigid foam filled circular seamless tube energy absorber under quasi-static axial load

Tanasković

Franklin

Mitrović

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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The aim of this research work is investigations of absorption characteristics of a circular seamless tube collision absorber filled by rigid polyurethane (PU) foam under axial load. Shrinking of circular tube passing through cone bushing starts after absorber is activated at the moment of collision. The energy absorption realises in three ways: elastic-plastic deformation of the tube wall, friction between absorption elements and compression the rigid PU foam inside the tube. Using rigid PU foam, as the seamless tube filler, in the process of collision energy absorption increases absorption power in comparing to with only empty tube, as well as gives gradual increases of deformation resistance during deformation process. Experimental research was prepared and realized in the laboratory using the scaled samples. The effect of rigid PU foam, configuration of absorber filled by PU foam on the absorption power and manufacturing technology of the samples, are considered and discussed in this paper. The results indicate that the shrinking foam filled tube absorber has for about 18% bigger absorption power than the empty one. Formation of numerical model and numerical analyses of shrinking foam filled tube absorber were realized using ANSYS software package. Force vs. stroke (F(s)) diagrams obtained by tests and numerical analyses are in a good correlation which confirms formed numerical model as a suitable for further quasi-static analyses and for dimensioning the similar types of absorber.

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“…Certain initial geometric imperfections such as grooves [17], holes [18], origami patterns [19], annular rings [20], and pulling strips [21] have been introduced in tubes to reduce the initial peak force. However, these imperfections can reduce the stiffness and load-carrying capacity of tubular structures, and especially weaken radial stiffness and lateral or oblique impact resistance significantly.…”

Section: Introductionmentioning

confidence: 99%

Static and dynamic crushing of novel porous crochet-sintered metal and its filled composite tube

Liu

Xiao

et al. 2019

Composite Structures

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A novel porous crochet-sintered metal (PCSM) is fabricated by rolling a crocheted porous cloth and subsequent vacuum sintering using a continual single super-fine soft 304 rope twisted by 49 fibers as raw material. This work investigates the quasi-static and dynamic axial crushing response of PCSMs and their filled composite tubes. The pore structures of PCSMs are formed by inter-crocheted and multiple inter-locked rope skeletons and metallurgical bonds. The PCSMs have almost no initial impact effects with a high crushing force efficiency. Filling the PCSMs changes the deformation model of 6063 tube, improves the static crashworthiness parameters of 6063 tube by 8-25% with almost no increasing initial impact effect, and doesn't always play a positive role in dynamic absorption. Porosity has obvious influence on the quasistatic and dynamic behavior and crashworthiness of PCSMs and their filled composite tube, and the effect of porosity on dynamic crashworthiness of composite tube is greater than that on quasi-static crashworthiness of composite tube. The PCSMs and their composite tubes show great potential for application in energy absorbers. The method of filling PCSM into bare tube is possible to improve the energy absorption ability of thin-walled tube with almost no increase in the initial peak force.

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An experimental investigation on energy absorption of thin-walled bitubal structures by inversion and axial collapse

Cited by 28 publications

References 25 publications

The Crashworthiness Performance of Thin-Walled Energy Absorbing Devices: An Overview

The Crashworthiness Performance of Thin-Walled Energy Absorbing Devices: An Overview

Experimental research of absorption properties of rigid foam filled circular seamless tube energy absorber under quasi-static axial load

Static and dynamic crushing of novel porous crochet-sintered metal and its filled composite tube

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