Parameterization of criss-cross configurations for multiobjective crashworthiness optimization

Sun, G; Pang, T; Fang, J; Li, G; Li, Q

Parameterization of criss-cross configurations for multiobjective crashworthiness optimization

Sun, G Pang, T Fang, J

Li, G Li, Q

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Publication Type:: Journal Article
Citation:: International Journal of Mechanical Sciences, 2017, 124-125 pp. 145 - 157
Issue Date:: 2017-05-01

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Field	Value	Language
dc.contributor.author	Sun, G	en_US
dc.contributor.author	Pang, T	en_US
dc.contributor.author	Fang, J https://orcid.org/0000-0003-0119-6108	en_US
dc.contributor.author	Li, G	en_US
dc.contributor.author	Li, Q	en_US
dc.date.issued	2017-05-01	en_US
dc.identifier.citation	International Journal of Mechanical Sciences, 2017, 124-125 pp. 145 - 157	en_US
dc.identifier.issn	0020-7403	en_US
dc.identifier.uri	http://hdl.handle.net/10453/106112
dc.description.abstract	© 2017 Elsevier Ltd Thin-walled tubes have exhibited extraordinary advantages in lightweight and energy absorption for crashing scenarios. Geometric configuration of such tubal structures is of decisive effects on crashing behaviors. In this study, crashing characteristics of conventional square tube and a criss-cross tube were first conducted using both experimental and numerical analyses, through which the finite element (FE) models were well validated. It was also revealed that the energy absorption of the criss-cross sectional tube was about 150% higher than that of square column with the same weight. Further, a range of criss-cross sections were parametrically modeled with spline curves and a parametric study was subsequently performed to explore the effects of different parameterized shapes on crashing characteristics. It was found that the geometric parameters significantly affected crashworthiness of the criss-cross tubes, and the criss-cross tubes with a spline curve (CCT_SPL) surpass the criss-cross tubes with a straight line (CCT_STR) in crashworthiness with the same weight. Finally, to optimize the crashworthiness of parameterized criss-cross tubes, the non-dominated sorting genetic algorithm II (NSGA-II) was adopted to seek optimal criss-cross shapes for improving specific energy absorption (SEA) and reducing the peak crashing force (Fmax), simultaneously. The optimization results indicate that the CCT_SPL profiles with reasonable geometric parameters are superior to the CCT_STR counterparts with an increase of 11.1% in specific energy absorption.	en_US
dc.relation.ispartof	International Journal of Mechanical Sciences	en_US
dc.relation.isbasedon	10.1016/j.ijmecsci.2017.02.027	en_US
dc.subject.classification	Mechanical Engineering & Transports	en_US
dc.title	Parameterization of criss-cross configurations for multiobjective crashworthiness optimization	en_US
dc.type	Journal Article
utslib.citation.volume	124-125	en_US
utslib.for	0910 Manufacturing Engineering	en_US
utslib.for	0905 Civil Engineering	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.publication-status	Published	en_US
pubs.volume	124-125	en_US

Abstract:

© 2017 Elsevier Ltd Thin-walled tubes have exhibited extraordinary advantages in lightweight and energy absorption for crashing scenarios. Geometric configuration of such tubal structures is of decisive effects on crashing behaviors. In this study, crashing characteristics of conventional square tube and a criss-cross tube were first conducted using both experimental and numerical analyses, through which the finite element (FE) models were well validated. It was also revealed that the energy absorption of the criss-cross sectional tube was about 150% higher than that of square column with the same weight. Further, a range of criss-cross sections were parametrically modeled with spline curves and a parametric study was subsequently performed to explore the effects of different parameterized shapes on crashing characteristics. It was found that the geometric parameters significantly affected crashworthiness of the criss-cross tubes, and the criss-cross tubes with a spline curve (CCT_SPL) surpass the criss-cross tubes with a straight line (CCT_STR) in crashworthiness with the same weight. Finally, to optimize the crashworthiness of parameterized criss-cross tubes, the non-dominated sorting genetic algorithm II (NSGA-II) was adopted to seek optimal criss-cross shapes for improving specific energy absorption (SEA) and reducing the peak crashing force (Fmax), simultaneously. The optimization results indicate that the CCT_SPL profiles with reasonable geometric parameters are superior to the CCT_STR counterparts with an increase of 11.1% in specific energy absorption.

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http://hdl.handle.net/10453/106112