Article
Engineering, Multidisciplinary
KaiQing Zhang, GengDong Cheng, Yu Wang
Summary: This paper investigates the structural optimization problem for additive manufacturing. It explores a method to relax the overhang angle constraint and proposes a formula to estimate the maximum allowable overhang length. The horizontal minimum length constraint is employed to suppress the hanging feature. Numerical examples demonstrate the effectiveness of this method.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Jianchao Chen, Jiaxun Cheng, Xinye Zhang, Jiachun Wang, Changdong Zhang
Summary: This paper proposes an effective method to eliminate supports in additive manufacturing during the topology optimization stage. Numerical examples and experiments are provided to validate the capabilities of the presented algorithm.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Computer Science, Interdisciplinary Applications
Kaiqing Zhang, Gengdong Cheng
Summary: This paper studies the minimum compliance structural topology optimization for additive manufacturing, and proposes a concise optimization formulation to effectively suppress undesirable features in the design by improving constraint aggregating functions and aggregating constraints.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Computer Science, Interdisciplinary Applications
Alain Garaigordobil, Ruben Ansola, Javier Canales, Roque Borinaga
Summary: This paper investigates the topology optimization of structures subjected to self-weight loads with self-supporting constraints for additive manufacturing. The proposed method combines an effective numerical procedure for contour evaluation with a modified version of the power-law model for low densities to eliminate problems associated with self-weight loads. The proposed technique for overhang edge detection and a variable mask size technique contribute to the effectiveness and robustness of the method.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Computer Science, Interdisciplinary Applications
Alain Garaigordobil, Ruben Ansola, Igor Fernandez de Bustos
Summary: This article discusses the Dripping Effect in topology optimization for Additive Manufacturing and proposes an effective prevention strategy. Despite differing opinions on how to prevent it, the method introduced in this paper successfully avoids the phenomenon.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Eilam Amir, Oded Amir
Summary: This paper introduces a layered construction approach to embedding overhang limitation and support structure requirements in topology optimization, minimizing compliance and deformation caused by body forces. Through investigating three parameterizations, significant reduction of overhang violation with minimal compromise of structural performance is achieved, showing the potential for further improvement through manipulation of construction parameters. The procedures are implemented in a parallel computing environment, suitable for modern high-resolution topology optimization.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Multidisciplinary
Reza Behrou, Kathryn Kirsch, Ram Ranjan, James K. Guest
Summary: This paper proposes a method that integrates projection-based approaches with fluid topology optimization to design additively manufactured fluidic components without internal support structures. The method leverages past work in overhang constraints for solid mechanics and considers incompressible Navier-Stokes equations for laminar fluid flow.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Emiel van de Ven, Robert Maas, Can Ayas, Matthijs Langelaar, Fred van Keulen
Summary: This study compares the advantages and disadvantages of the layer-by-layer overhang filter and the continuous, front propagation-based overhang filter, showing that the discrete layer-by-layer filter can be formulated in a continuous setting using front propagation. The continuous overhang filter is improved by incorporating complementary aspects of the layer-by-layer filter, eliminating the need for continuation of the overhang filter and a user-defined parameter.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Multidisciplinary
Mikihiro Tajima, Takayuki Yamada
Summary: This paper proposes a coupled fictitious physics model (CFPM) to solve the problem of geometric constraints in topology optimization and laser powder bed fusion (LPBF), thereby improving convergence.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Zijun Wu, Renbin Xiao
Summary: This paper proposes a self-supporting structure design method that addresses the inconsistency issue between design and manufacturing in layer-wise manufacturing by considering factors such as overhang angle and length. Through topology optimization, support relationship mapping, and fabrication model establishment, the manufacturability of the structure is aligned with its design performance.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Yingchun Bai, Jiale Cai, Zixiang Wang, Siqi Li
Summary: This paper proposes a magneto-structural topology optimization method considering additive manufacturing constraints, which can generate and fabricate superior-performance yet lightweight magneto-structural components through the sequential use of topology optimization and additive manufacturing. The design manufacturability of optimized designs is improved by incorporating two important additive manufacturing constraints into the topology optimization model.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Stephen W. K. Roper, Haksung Lee, Mongyoung Huh, Il Yong Kim
Summary: The aerospace industry is constantly seeking breakthroughs in lightweight design by integrating advanced materials and manufacturing methods. This paper presents practical examples of multi-material topology optimization in aerospace, including the first simultaneous application of isotropic and orthotropic material models.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Multidisciplinary
Bin Xu, Yongsheng Han, Lei Zhao, Yi Min Xie
Summary: This article proposes a design method to minimize compliance or maximize fundamental natural frequency of continuum structures in additive manufacturing processes. Topology optimization is performed using the BESO method, with sensitivity expressions derived for the objectives. Various thin feature and support structure constraints are investigated, showing the effectiveness of the proposed method in achieving optimized solutions for continuum structures that are additive manufacturing friendly.
ENGINEERING OPTIMIZATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Yichang Liu, Mingdong Zhou, Chuang Wei, Zhongqin Lin
Summary: This paper presents a density-based topology optimization approach for designing self-supporting and lightweight infill structures with efficient mechanical properties for enclosed structural shells. By introducing new overhang and localized volume constraints, effective design of infill structures is achieved while avoiding impractical design solutions.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Computer Science, Interdisciplinary Applications
Tianye Wang, Joshua Gasick, Sicheng Sun, Xiaoping Qian
Summary: This paper studies the manufacturability of 3D topologically optimized heat sinks for forced-air cooling using both additive manufacturing and subtractive numerical control machining. Two approaches were adopted to mitigate manufacturing difficulties, including the addition of a constraint on the projected undercut perimeter to limit non-self supporting features in additive manufacturing, and the adoption of a multi-axis machining constraint for manufacturability in an alternative manufacturing modality. Local refinement of meshing and unit-cell assembly techniques were used during optimization. Simulation results showed that topologically optimized heat sinks outperformed conventional parallel fins in temperature performance. The practical efficacy of the overhang angle control constraint was demonstrated through direct metal laser sintering of the constrained designs in aluminum and stainless steel.
ENGINEERING WITH COMPUTERS
(2023)
Article
Acoustics
Won Gi Lee, Jin Woo Lee, Min Sung Hong, Sung-Ho Nam, YongHo Jeon, Moon G. Lee
SHOCK AND VIBRATION
(2015)
Article
Computer Science, Interdisciplinary Applications
Yu-Hsin Kuo, Chih-Chun Cheng, Yang-Shan Lin, Cheng-Hung San
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2018)
Article
Engineering, Mechanical
W. N. Cheng, C. C. Cheng
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2014)
Article
Engineering, Mechanical
P. C. Tsai, C. C. Cheng, Y. C. Hwang
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2014)
Article
Computer Science, Interdisciplinary Applications
T. D. Tsai, C. C. Cheng
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2013)
Article
Chemistry, Analytical
Yu-Hao Chang, Chien-Sheng Liu, Chih-Chun Cheng
Article
Automation & Control Systems
Yu-Ta Chen, Pruthvikumar More, Chien-Sheng Liu, Chih-Chun Cheng
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Automation & Control Systems
Ping-Chun Tsai, Chih-Chun Cheng, Wei-Jen Chen, Shao-Jung Su
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Automation & Control Systems
Wen-Nan Cheng, Chih-Chun Cheng, Yao-Hsuan Lei, Ping-Chun Tsai
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Engineering, Mechanical
Ping Chun Tsai, Chih Chun Cheng, Yin Chun Cheng
MECHANICAL ENGINEERING JOURNAL
(2017)
Proceedings Paper
Materials Science, Multidisciplinary
T. D. Tsai, C. C. Cheng
ADVANCED MANUFACTURING FOCUSING ON MULTI-DISCIPLINARY TECHNOLOGIES
(2012)
Article
Acoustics
W. N. Cheng, C. C. Cheng, G. H. Koopmann
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2011)