Topological design optimization of lattice structures to maximize shear stiffness

Du, Y; Li, H; Luo, Z; Tian, Q

Topological design optimization of lattice structures to maximize shear stiffness

Du, Y Li, H Luo, Z

Tian, Q

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Publication Type:: Journal Article
Citation:: Advances in Engineering Software, 2017, 112 pp. 211 - 221
Issue Date:: 2017-10-01

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Field	Value	Language
dc.contributor.author	Du, Y	en_US
dc.contributor.author	Li, H	en_US
dc.contributor.author	Luo, Z https://orcid.org/0000-0002-6953-3986	en_US
dc.contributor.author	Tian, Q	en_US
dc.date.issued	2017-10-01	en_US
dc.identifier.citation	Advances in Engineering Software, 2017, 112 pp. 211 - 221	en_US
dc.identifier.issn	0965-9978	en_US
dc.identifier.uri	http://hdl.handle.net/10453/124836
dc.description.abstract	© 2017 Elsevier Ltd To improve the poor shear performance of periodic lattice structure consisting of hexagonal unit cells, this study develops a new computational design method to apply topology optimization to search the best topological layout for lattice structures with enhanced shear stiffness. The design optimization problem of micro-cellular material is formulated based on the properties of macrostructure to maximize the shear modulus under a prescribed volume constraint using the energy-based homogenization method. The aim is to determine the optimal distribution of material phase within the periodic unit cell of lattice structure. The proposed energy-based homogenization procedure utilizes the sensitivity filter technique, especially, a modified optimal algorithm is proposed to evolve the microstructure of lattice materials with distinct topological boundaries. A high shear stiffness structure is obtained by solving the optimization model. Then, the mechanical equivalent properties are obtained and compared with those of the hexagonal honeycomb sandwich structure using a theoretical approach and the finite element method (FEM) according to the optimized structure. It demonstrates the effectiveness of the proposed method in this paper. Finally, the structure is manufactured, and then the properties are tested. Results show that the shear stiffness and bearing properties of the optimized lattice structure is better than that of the traditional honeycomb sandwich structure. In general, the proposed method can be effectively applied to the design of periodic lattice structures with high shear resistance and super bearing property.	en_US
dc.relation.ispartof	Advances in Engineering Software	en_US
dc.relation.isbasedon	10.1016/j.advengsoft.2017.04.011	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Applied Mathematics	en_US
dc.title	Topological design optimization of lattice structures to maximize shear stiffness	en_US
dc.type	Journal Article
utslib.citation.volume	112	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	08 Information and Computing Sciences	en_US
utslib.for	09 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 Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US
pubs.volume	112	en_US

Abstract:

© 2017 Elsevier Ltd To improve the poor shear performance of periodic lattice structure consisting of hexagonal unit cells, this study develops a new computational design method to apply topology optimization to search the best topological layout for lattice structures with enhanced shear stiffness. The design optimization problem of micro-cellular material is formulated based on the properties of macrostructure to maximize the shear modulus under a prescribed volume constraint using the energy-based homogenization method. The aim is to determine the optimal distribution of material phase within the periodic unit cell of lattice structure. The proposed energy-based homogenization procedure utilizes the sensitivity filter technique, especially, a modified optimal algorithm is proposed to evolve the microstructure of lattice materials with distinct topological boundaries. A high shear stiffness structure is obtained by solving the optimization model. Then, the mechanical equivalent properties are obtained and compared with those of the hexagonal honeycomb sandwich structure using a theoretical approach and the finite element method (FEM) according to the optimized structure. It demonstrates the effectiveness of the proposed method in this paper. Finally, the structure is manufactured, and then the properties are tested. Results show that the shear stiffness and bearing properties of the optimized lattice structure is better than that of the traditional honeycomb sandwich structure. In general, the proposed method can be effectively applied to the design of periodic lattice structures with high shear resistance and super bearing property.

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http://hdl.handle.net/10453/124836