Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting

Selective laser melting (SLM)-produced variable-density (VD) lattice structures are deemed a promising solution to lightweight design. However, due to the large number of cells in the structures, designing VD structures is still time-consuming and exhibits poor adaptability to external load. Therefo...

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Autores principales:	Jun Song, Qian Tang, Qixiang Feng, Shuai Ma, Fuyu Guo, Quanquan Han
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Selective laser melting Variable-density lattice structures Modelling approach Finite element analysis Ti6Al4V Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/d04832f193c24451a71d35bb99db515e
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spelling	oai:doaj.org-article:d04832f193c24451a71d35bb99db515e2021-11-18T04:43:27ZInvestigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting0264-127510.1016/j.matdes.2021.110236https://doaj.org/article/d04832f193c24451a71d35bb99db515e2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007917https://doaj.org/toc/0264-1275Selective laser melting (SLM)-produced variable-density (VD) lattice structures are deemed a promising solution to lightweight design. However, due to the large number of cells in the structures, designing VD structures is still time-consuming and exhibits poor adaptability to external load. Therefore, in order to decrease the number of design variables in VD design, this paper proposed a modelling approach for VD lattice structures manufactured using SLM. The stress values provided by finite element analysis (FEA) were grouped according to k-means clustering, where the sizes of lattice cells in the same group remain identical. Then the relative densities of cells’ in all groups are obtained and the VD model is generated. By taking the design of a VD lattice beam as an example, the feasibility of the proposed method was verified by conducting FEA and three-point bending tests on SLM-produced Ti6Al4V samples, as well as using morphological observation measures. The results show that the number of design variables for reconstructing the beam was decreased from 125 to 8, and the VD samples reached the designed carrying capacity and also presented superior lightweight performance compared with their isovolumetric homogenous counterparts.Jun SongQian TangQixiang FengShuai MaFuyu GuoQuanquan HanElsevierarticleSelective laser meltingVariable-density lattice structuresModelling approachFinite element analysisTi6Al4VMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110236- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Selective laser melting Variable-density lattice structures Modelling approach Finite element analysis Ti6Al4V Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Selective laser melting Variable-density lattice structures Modelling approach Finite element analysis Ti6Al4V Materials of engineering and construction. Mechanics of materials TA401-492 Jun Song Qian Tang Qixiang Feng Shuai Ma Fuyu Guo Quanquan Han Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
description	Selective laser melting (SLM)-produced variable-density (VD) lattice structures are deemed a promising solution to lightweight design. However, due to the large number of cells in the structures, designing VD structures is still time-consuming and exhibits poor adaptability to external load. Therefore, in order to decrease the number of design variables in VD design, this paper proposed a modelling approach for VD lattice structures manufactured using SLM. The stress values provided by finite element analysis (FEA) were grouped according to k-means clustering, where the sizes of lattice cells in the same group remain identical. Then the relative densities of cells’ in all groups are obtained and the VD model is generated. By taking the design of a VD lattice beam as an example, the feasibility of the proposed method was verified by conducting FEA and three-point bending tests on SLM-produced Ti6Al4V samples, as well as using morphological observation measures. The results show that the number of design variables for reconstructing the beam was decreased from 125 to 8, and the VD samples reached the designed carrying capacity and also presented superior lightweight performance compared with their isovolumetric homogenous counterparts.
format	article
author	Jun Song Qian Tang Qixiang Feng Shuai Ma Fuyu Guo Quanquan Han
author_facet	Jun Song Qian Tang Qixiang Feng Shuai Ma Fuyu Guo Quanquan Han
author_sort	Jun Song
title	Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
title_short	Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
title_full	Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
title_fullStr	Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
title_full_unstemmed	Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
title_sort	investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d04832f193c24451a71d35bb99db515e
work_keys_str_mv	AT junsong investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting AT qiantang investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting AT qixiangfeng investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting AT shuaima investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting AT fuyuguo investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting AT quanquanhan investigationonthemodellingapproachforvariabledensitylatticestructuresfabricatedusingselectivelasermelting
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Investigation on the modelling approach for variable-density lattice structures fabricated using selective laser melting

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