Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties
With the recent development of additive manufacturing technology represented by 3D printers, various lattice structures have emerged because their mechanical properties can be designed artificially according to their structural characteristics. This study aims to develop knowledge that will contribu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2023-11-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/89/927/89_23-00213/_pdf/-char/en |
| _version_ | 1797449591182852096 |
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| author | Tomohisa KOJIMA Yuta TAKASE Tomoaki TSUJI |
| author_facet | Tomohisa KOJIMA Yuta TAKASE Tomoaki TSUJI |
| author_sort | Tomohisa KOJIMA |
| collection | DOAJ |
| description | With the recent development of additive manufacturing technology represented by 3D printers, various lattice structures have emerged because their mechanical properties can be designed artificially according to their structural characteristics. This study aims to develop knowledge that will contribute to the design of lattice structures with tailored and desired mechanical properties. Among the many unit cell topologies in the lattice structures that have been designed in numerous studies, there are several basic structures and a variety of additional structures that were derived from these basic structures. However, there is a degree of ambiguity as to which of these structures should be regarded as the basic structures. In this study, the basic structures of a lattice structure with orthogonal symmetry were derived by determining the edges of the struts using a mathematical combination approach. Then, the deformation characteristics of them were evaluated through elasto-plastic finite element analysis. Five basic structures were determined by designing the unit cell of the lattice structure such that the struts pass through the vertices, the midpoints of the edges, and the centers of the faces in the cubic design region. It was found that structures with the same strut directions in their unit cells have similar stiffness distributions, and the basic structures obtained can be classified accordingly into three types. Finite element analysis of the compression of a micro-lattice structure composed of these basic structures confirmed that different deformation characteristics appeared during plastic collapse for each type of classified basic structure, and that the strut deformation type determined the overall deformation characteristics. Evaluation of the stiffness and the plastic collapse stress showed that with stretch-dominant strut deformation, lattice structures can be made lighter in weight while still maintaining some stiffness and some plastic collapse stress. |
| first_indexed | 2024-03-09T14:28:13Z |
| format | Article |
| id | doaj.art-d1dc1a1840cf4be281476e8ca89a26fa |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-03-09T14:28:13Z |
| publishDate | 2023-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-d1dc1a1840cf4be281476e8ca89a26fa2023-11-28T05:07:41ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612023-11-018992723-0021323-0021310.1299/transjsme.23-00213transjsmeDerivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive propertiesTomohisa KOJIMA0Yuta TAKASE1Tomoaki TSUJI2Department of Precision Mechanics, Chuo UniversityPrecision Engineering Course, Chuo UniversityDepartment of Precision Mechanics, Chuo UniversityWith the recent development of additive manufacturing technology represented by 3D printers, various lattice structures have emerged because their mechanical properties can be designed artificially according to their structural characteristics. This study aims to develop knowledge that will contribute to the design of lattice structures with tailored and desired mechanical properties. Among the many unit cell topologies in the lattice structures that have been designed in numerous studies, there are several basic structures and a variety of additional structures that were derived from these basic structures. However, there is a degree of ambiguity as to which of these structures should be regarded as the basic structures. In this study, the basic structures of a lattice structure with orthogonal symmetry were derived by determining the edges of the struts using a mathematical combination approach. Then, the deformation characteristics of them were evaluated through elasto-plastic finite element analysis. Five basic structures were determined by designing the unit cell of the lattice structure such that the struts pass through the vertices, the midpoints of the edges, and the centers of the faces in the cubic design region. It was found that structures with the same strut directions in their unit cells have similar stiffness distributions, and the basic structures obtained can be classified accordingly into three types. Finite element analysis of the compression of a micro-lattice structure composed of these basic structures confirmed that different deformation characteristics appeared during plastic collapse for each type of classified basic structure, and that the strut deformation type determined the overall deformation characteristics. Evaluation of the stiffness and the plastic collapse stress showed that with stretch-dominant strut deformation, lattice structures can be made lighter in weight while still maintaining some stiffness and some plastic collapse stress.https://www.jstage.jst.go.jp/article/transjsme/89/927/89_23-00213/_pdf/-char/enlattice structurelightweight structuremechanical characterizationfinite element analysiselasto-plastic analysiscompressive propertiesbucklingplastic instabilityadditive manufacturing |
| spellingShingle | Tomohisa KOJIMA Yuta TAKASE Tomoaki TSUJI Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties Nihon Kikai Gakkai ronbunshu lattice structure lightweight structure mechanical characterization finite element analysis elasto-plastic analysis compressive properties buckling plastic instability additive manufacturing |
| title | Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| title_full | Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| title_fullStr | Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| title_full_unstemmed | Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| title_short | Derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| title_sort | derivation of the basic structures of orthogonally symmetric lattice structures and finite element analysis of their compressive properties |
| topic | lattice structure lightweight structure mechanical characterization finite element analysis elasto-plastic analysis compressive properties buckling plastic instability additive manufacturing |
| url | https://www.jstage.jst.go.jp/article/transjsme/89/927/89_23-00213/_pdf/-char/en |
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