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Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing

A parameterization modeling method based on finite element mesh to create complex large-scale lattice structures for AM is presented, and a corresponding approach for size optimization of lattice structures is also developed. In the modeling method, meshing technique is employed to obtain the meshes...

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Detalles Bibliográficos
Autores principales: Chen, Wenjiong, Zheng, Xiaonan, Liu, Shutian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6265793/
https://www.ncbi.nlm.nih.gov/pubmed/30360562
http://dx.doi.org/10.3390/ma11112073
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author Chen, Wenjiong
Zheng, Xiaonan
Liu, Shutian
author_facet Chen, Wenjiong
Zheng, Xiaonan
Liu, Shutian
author_sort Chen, Wenjiong
collection PubMed
description A parameterization modeling method based on finite element mesh to create complex large-scale lattice structures for AM is presented, and a corresponding approach for size optimization of lattice structures is also developed. In the modeling method, meshing technique is employed to obtain the meshes and nodes of lattice structures for a given geometry. Then, a parametric description of lattice unit cells based on the element type, element nodes and their connecting relationships is developed. Once the unit cell design is selected, the initial lattice structure can be assembled by the unit cells in each finite element. Furthermore, modification of lattice structures can be operated by moving mesh nodes and changing cross-sectional areas of bars. The graded and non-uniform lattice structures can be constructed easily based on the proposed modeling method. Moreover, a size optimization algorithm based on moving iso-surface threshold (MIST) method is proposed to optimize lattice structures for enhancing the mechanical performance. To demonstrate the effectiveness of the proposed method, numerical examples and experimental testing are presented, and experimental testing shows 11% improved stiffness of the optimized non-uniform lattice structure than uniform one.
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spelling pubmed-62657932018-12-17 Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing Chen, Wenjiong Zheng, Xiaonan Liu, Shutian Materials (Basel) Article A parameterization modeling method based on finite element mesh to create complex large-scale lattice structures for AM is presented, and a corresponding approach for size optimization of lattice structures is also developed. In the modeling method, meshing technique is employed to obtain the meshes and nodes of lattice structures for a given geometry. Then, a parametric description of lattice unit cells based on the element type, element nodes and their connecting relationships is developed. Once the unit cell design is selected, the initial lattice structure can be assembled by the unit cells in each finite element. Furthermore, modification of lattice structures can be operated by moving mesh nodes and changing cross-sectional areas of bars. The graded and non-uniform lattice structures can be constructed easily based on the proposed modeling method. Moreover, a size optimization algorithm based on moving iso-surface threshold (MIST) method is proposed to optimize lattice structures for enhancing the mechanical performance. To demonstrate the effectiveness of the proposed method, numerical examples and experimental testing are presented, and experimental testing shows 11% improved stiffness of the optimized non-uniform lattice structure than uniform one. MDPI 2018-10-23 /pmc/articles/PMC6265793/ /pubmed/30360562 http://dx.doi.org/10.3390/ma11112073 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chen, Wenjiong
Zheng, Xiaonan
Liu, Shutian
Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title_full Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title_fullStr Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title_full_unstemmed Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title_short Finite-Element-Mesh Based Method for Modeling and Optimization of Lattice Structures for Additive Manufacturing
title_sort finite-element-mesh based method for modeling and optimization of lattice structures for additive manufacturing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6265793/
https://www.ncbi.nlm.nih.gov/pubmed/30360562
http://dx.doi.org/10.3390/ma11112073
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