Dynamical bending analysis and optimization design for functionally graded thickness (FGT) tube

Sun, G; Tian, X; Fang, J; Xu, F; Li, G; Huang, X

Dynamical bending analysis and optimization design for functionally graded thickness (FGT) tube

Sun, G Tian, X Fang, J

Xu, F Li, G Huang, X

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Publication Type:: Journal Article
Citation:: International Journal of Impact Engineering, 2015, 78 pp. 128 - 137
Issue Date:: 2015-01-01

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Field	Value	Language
dc.contributor.author	Sun, G	en_US
dc.contributor.author	Tian, X	en_US
dc.contributor.author	Fang, J https://orcid.org/0000-0003-0119-6108	en_US
dc.contributor.author	Xu, F	en_US
dc.contributor.author	Li, G	en_US
dc.contributor.author	Huang, X	en_US
dc.date.issued	2015-01-01	en_US
dc.identifier.citation	International Journal of Impact Engineering, 2015, 78 pp. 128 - 137	en_US
dc.identifier.issn	0734-743X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/119287
dc.description.abstract	© 2014 Elsevier Ltd. All rights reserved. As a relatively new component with a higher efficiency of material utilization, functionally graded thickness (FGT) structure with desired varying wall thickness has been becoming more and more attractive. In order to sufficiently understand the crashworthiness of FGT under lateral impact, firstly, the finite element (FE) models of thin-walled columns with uniform thickness (UT) and FGT under lateral loading are established and validated by experimental results. It is exhibited that the FE simulations are in good agreement with experimental tests. Then, the crashworthiness of UT tube and the corresponding FGT tube is compared, and the results reveal that the FGT tube can absorb more energy but generate larger force than UT tube under the same weight. Further, parametric analyses show the gradient exponent, wall thickness range, the tube diameter and yielding stress have significant effects on the crashworthiness of FGT tubes. Finally, a multiobjective particle swarm optimization (MOPSO) method is used to optimally seek for those design parameters, where surrogate modeling methods are adopted to formulate the specific energy absorption (SEA) and peak crushing force functions. The results yielded from the optimization demonstrate that the FGT tube is superior to its uniform thickness counterpart in overall crashing behavior under lateral impact. Therefore, FGT tubes are recommended as potential absorbers of crashing energy under lateral loading.	en_US
dc.relation.ispartof	International Journal of Impact Engineering	en_US
dc.relation.isbasedon	10.1016/j.ijimpeng.2014.12.007	en_US
dc.subject.classification	Mechanical Engineering & Transports	en_US
dc.title	Dynamical bending analysis and optimization design for functionally graded thickness (FGT) tube	en_US
dc.type	Journal Article
utslib.citation.volume	78	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	0901 Aerospace Engineering	en_US
utslib.for	0905 Civil 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	78	en_US

Abstract:

© 2014 Elsevier Ltd. All rights reserved. As a relatively new component with a higher efficiency of material utilization, functionally graded thickness (FGT) structure with desired varying wall thickness has been becoming more and more attractive. In order to sufficiently understand the crashworthiness of FGT under lateral impact, firstly, the finite element (FE) models of thin-walled columns with uniform thickness (UT) and FGT under lateral loading are established and validated by experimental results. It is exhibited that the FE simulations are in good agreement with experimental tests. Then, the crashworthiness of UT tube and the corresponding FGT tube is compared, and the results reveal that the FGT tube can absorb more energy but generate larger force than UT tube under the same weight. Further, parametric analyses show the gradient exponent, wall thickness range, the tube diameter and yielding stress have significant effects on the crashworthiness of FGT tubes. Finally, a multiobjective particle swarm optimization (MOPSO) method is used to optimally seek for those design parameters, where surrogate modeling methods are adopted to formulate the specific energy absorption (SEA) and peak crushing force functions. The results yielded from the optimization demonstrate that the FGT tube is superior to its uniform thickness counterpart in overall crashing behavior under lateral impact. Therefore, FGT tubes are recommended as potential absorbers of crashing energy under lateral loading.

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http://hdl.handle.net/10453/119287