Cargando…
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...
Autores principales: | , , |
---|---|
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 |
_version_ | 1783375700279951360 |
---|---|
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. |
format | Online Article Text |
id | pubmed-6265793 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT chenwenjiong finiteelementmeshbasedmethodformodelingandoptimizationoflatticestructuresforadditivemanufacturing AT zhengxiaonan finiteelementmeshbasedmethodformodelingandoptimizationoflatticestructuresforadditivemanufacturing AT liushutian finiteelementmeshbasedmethodformodelingandoptimizationoflatticestructuresforadditivemanufacturing |