Concurrent topology optimization of parts and their supports for additive manufacturing with thermal deformation constraint
A typical manufacturing failure in powder bed additive manufacturing (AM) is caused by the collision between the already printed structure and the powder recoater due to large thermal deformation. This paper presents a density-based topology optimization (TO) approach to concurrently design parts and their supports that are not susceptible to such a manufacturing failure. The thermal deformation during the layer-by-layer AM process is predicted based on an inherent strain method, and the top surfaces' upward deformations are constrained below the powder layer thickness to avoid recoater collision. To increase the design freedom of TO, the parts and their supports are composed of lattice unit cells with different volume fractions, whose effective stiffness matrixes are predicted by the numerical homogenization and surrogate models. Besides, an overhang constraint and a two-field-based length scale control formulation are also utilized, ensuring overall manufacturability. With the proposed approach, lightweight structures with optimized mechanical properties and controllable manufacturing qualities can be obtained. Numerical examples are given to demonstrate the effectiveness of the proposed approach.
National Key Research and Development Program of China[2021YFB1715400];National Natural Science Foundation of China;
|WOS Research Area|
Computer Science ; Engineering
Computer Science, Interdisciplinary Applications ; Engineering, Civil
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||School of System Design and Intelligent Manufacturing|
1.Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,200240,China
2.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,518055,China
Liu，Yichang,Huang，Xiaoyu,Xiong，Yi,et al. Concurrent topology optimization of parts and their supports for additive manufacturing with thermal deformation constraint[J]. Computers and Structures,2023,289.
Liu，Yichang,Huang，Xiaoyu,Xiong，Yi,Zhou，Mingdong,&Lin，Zhongqin.(2023).Concurrent topology optimization of parts and their supports for additive manufacturing with thermal deformation constraint.Computers and Structures,289.
Liu，Yichang,et al."Concurrent topology optimization of parts and their supports for additive manufacturing with thermal deformation constraint".Computers and Structures 289(2023).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.