On functionally-graded crashworthy shape of conical structures for multiple load cases

Pang, T; Li, Y; Kang, H; Sun, G; Fang, J; Li, Q

On functionally-graded crashworthy shape of conical structures for multiple load cases

Pang, T Li, Y Kang, H Sun, G Fang, J

Li, Q

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Publication Type:: Journal Article
Citation:: Journal of Mechanical Science and Technology, 2017, 31 (6), pp. 2861 - 2873
Issue Date:: 2017-06-01

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Field	Value	Language
dc.contributor.author	Pang, T	en_US
dc.contributor.author	Li, Y	en_US
dc.contributor.author	Kang, H	en_US
dc.contributor.author	Sun, G	en_US
dc.contributor.author	Fang, J https://orcid.org/0000-0003-0119-6108	en_US
dc.contributor.author	Li, Q	en_US
dc.date.issued	2017-06-01	en_US
dc.identifier.citation	Journal of Mechanical Science and Technology, 2017, 31 (6), pp. 2861 - 2873	en_US
dc.identifier.issn	1738-494X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/125394
dc.description.abstract	© 2017, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany. Many studies on energy absorbers have been focused on tapered tubes because they have significant advantages in crashworthiness and provide a desired constant load-deflection response. However, few studies have been reported on tapered tubes with nonlinearlyvariable diameters along the longitudinal direction. This paper presents thin-walled Functionally graded tapered tube (FGTT) with a diameter varying nonlinearly subject to axial (0°) and oblique (10°, 20°, 30°) impacts. To explore the advantages of FGTT, conventional Straight/Conical circular tube (SCT/CCT) with the same mass are compared; and FGTTs with a gradient exponent n > 1 are found to be preferable to others in terms of energy absorption capacity under small impact angles. Then, crashworthiness analyses of different crushing distances are conducted and it is found that under a large impact angle (e.g. 20°, 30°), FGTT with a short crushing distance (e.g. 40 mm) have a higher mean crashing force than long crushing distance (e.g. 120 mm), especially for n > 1. In addition, the effect of geometric parameters, such as the gradient exponent n and diameter range ΔD between top (incident) and bottom (distal) diameters of FGTTs, are also studied and it is found that the FGTT with ΔD = 40 mm and n > 1 exhibits better crashworthiness than the others under small impact angles (0°, 10°). This paper demonstrates that such FGTT structures have a certain potential to be an energy absorber.	en_US
dc.relation.ispartof	Journal of Mechanical Science and Technology	en_US
dc.relation.isbasedon	10.1007/s12206-017-0529-y	en_US
dc.subject.classification	Mechanical Engineering & Transports	en_US
dc.title	On functionally-graded crashworthy shape of conical structures for multiple load cases	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	31	en_US
utslib.for	0102 Applied Mathematics	en_US
utslib.for	0913 Mechanical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	31	en_US

Abstract:

© 2017, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany. Many studies on energy absorbers have been focused on tapered tubes because they have significant advantages in crashworthiness and provide a desired constant load-deflection response. However, few studies have been reported on tapered tubes with nonlinearlyvariable diameters along the longitudinal direction. This paper presents thin-walled Functionally graded tapered tube (FGTT) with a diameter varying nonlinearly subject to axial (0°) and oblique (10°, 20°, 30°) impacts. To explore the advantages of FGTT, conventional Straight/Conical circular tube (SCT/CCT) with the same mass are compared; and FGTTs with a gradient exponent n > 1 are found to be preferable to others in terms of energy absorption capacity under small impact angles. Then, crashworthiness analyses of different crushing distances are conducted and it is found that under a large impact angle (e.g. 20°, 30°), FGTT with a short crushing distance (e.g. 40 mm) have a higher mean crashing force than long crushing distance (e.g. 120 mm), especially for n > 1. In addition, the effect of geometric parameters, such as the gradient exponent n and diameter range ΔD between top (incident) and bottom (distal) diameters of FGTTs, are also studied and it is found that the FGTT with ΔD = 40 mm and n > 1 exhibits better crashworthiness than the others under small impact angles (0°, 10°). This paper demonstrates that such FGTT structures have a certain potential to be an energy absorber.

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http://hdl.handle.net/10453/125394