Energy absorption improvement of circular tubes with externally press-fitted ring around tube surface subjected under axial and oblique impact loading

Isaac, Chukwuemeke William; Oluwole, Oluleke

doi:10.1016/j.tws.2016.10.006

Cited by 29 publications

(9 citation statements)

References 19 publications

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“…In the research of the oblique energy absorption characteristics of thin-walled structures, the crushing behaviors of single-cell tubes with different crosssectional shapes were studied. [39][40][41] The results show that the energy absorption capacity of tubes is reduced significantly under oblique loads when global deformation appears. Fang et al 29 investigated the crushing characteristics of single-cell and multi-cell tubes under multiple loading angles and found that multi-cell tubes have better energy absorption capacity under axial and oblique loads at 10°, but the trend is reversed under oblique loads at 20°and 30°.…”

Section: Introductionmentioning

confidence: 92%

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

Rakheja

Shangguan

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Thin-walled structures are widely used as energy absorbers in automotive vehicles due to their lightweight and high-energy absorption efficiency. In order to improve the energy absorption characteristics of thin-walled structures subjected to different loading angles, different types of novel multi-cell structures are proposed in this paper. The numerical method is used to study the crushing behaviors of the proposed multi-cell structures under different loading angles. It is found that the proposed multi-cell structures have considerably small initial peak force under axial load and avoid the appearance of global buckling deformation mode under oblique loads. Moreover, reasonably distributed wall thickness for each square tube in the thin-walled structure can enhance its energy absorption capacity under different loading angles.

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Section: Introductionmentioning

confidence: 92%

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

Rakheja

Shangguan

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The total energy absorption ( ) E aT can be obtained by summing the plastic energy absorbed, energy due to incremental change and energy absorbed due to circumferential stretching. For the idealized circular thin-walled tube, the total energy absorbed is given by (Isaac and Oluwole, 2016)…”

Section: Crushing Parameters For Idealized Thin-walled Tubementioning

confidence: 99%

“…However, most crash scenarios are due to dynamic impact. In this case, the deformation of the tube is erratic and unstable which can be observed from the crushing force-displacement history curve (Al Galib and Limam, 2004;Duarte et al, 2014;Isaac and Oluwole, 2016). The finite element integration schemes that have been used to analyse these two forms of impacts are the implicit and explicit time integration schemes (Kazanci and Bathe, 2012;Noels et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Crushing response of circular thin-walled tube with non-propagating crack subjected to dynamic oblique impact loading

Isaac

2019

International Journal of Protective Structures

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The dynamic oblique crushing of circular thin-walled tubes with the presence of non-propagating crack was investigated numerically. The material considered was strain rate sensitive with crack located at the distal end of the tube. Major crashworthiness parameters were obtained and the analysis of the structural response for idealized and finite element crushed thin-walled tubes was also carried out. The study shows that crack initiation on energy absorbing tubes increase their crushing force efficiency under oblique impact, decrease their crushing force efficiency under axial impact and reduce their crashworthiness performance such as the energy absorption capacity and specific energy absorption under axial and oblique impact. Results of the crashworthiness parameters, deformation modes, damage morphology, stress–strain relations, absorption energy characteristics and crushing force-displacement history were obtained. Furthermore, the numerical study reveals both the desirable and undesirable consequence of crack on the overall crashworthiness performance of energy absorbing circular thin-walled tubes.

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“…Many researchers studied the energy absorption characteristics of different geometries including corrugated tubes under axial and oblique impacts. 56–61 The outcome has shown that conical tubes have a great ability to absorb oblique impacts. It was also found that the important parameters in the study of simple conical tubes are shell thickness, semi-epical angle, and also the length of the tube.…”

Section: Introductionmentioning

confidence: 99%

Efficient crushable corrugated conical tubes for energy absorption considering axial and oblique loading

Ahmadi

Asgari

2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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Thin-walled structures are of much interest as energy absorption devices for their great crashworthiness and also low weight. Conical tubes are favorable structures because unlike most other geometries, they are also useful in oblique impacts. This paper investigated the effect of corrugations on energy absorption characteristics of conical tubes under quasi-static axial and oblique loadings. To do so, conical tubes with different corrugation geometries were analyzed using the finite element explicit code and the effects of corrugations on initial peak crushing force and specific energy absorption were studied. The finite element model was validated by experimental quasi-static compression tests on simple and corrugated aluminum cylinders. An efficient analytical solution for EA during axial loading was also derived and compared with the FEM solution. The crushing stableness was analyzed using the undulation of the load-carrying capacity parameter and it was shown that corrugations made collapsing mode, more predictable and controllable. The findings have shown that corrugated conical tubes have much better energy absorption characteristics compared with their non-corrugated counterparts. It was also discovered that during oblique loadings, introducing corrugations can significantly increase the specific energy absorption compared with simple cones.

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Energy absorption improvement of circular tubes with externally press-fitted ring around tube surface subjected under axial and oblique impact loading

Cited by 29 publications

References 19 publications

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

Crushing behavior and crashworthiness optimization of multi-cell square tubes under multiple loading angles

Crushing response of circular thin-walled tube with non-propagating crack subjected to dynamic oblique impact loading

Efficient crushable corrugated conical tubes for energy absorption considering axial and oblique loading

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