A Topology Optimization Algorithm Based on the Overhang Sensitivity Analysis for Additive Manufacturing

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Wang, Xinyi^1 ; Zhang, Changdong^1 ; Liu, Tingting^1

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing

210094, China^1

关键词: Design freedom;    Design variables;    Fused deposition modelling;    Manufacturing cost;    Optimization algorithms;    Optimization approach;    Performance sensitivity;    Support structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/3/032036/pdf
DOI  :  10.1088/1757-899X/382/3/032036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The integration of topology optimization(TO) and additive manufacturing(AM) has the huge potential to expand the design freedom of parts. However, traditional topology optimization approaches are not tailored to the particular characteristics of AM processes, resulting in a large number of overhangs in these designs, which lead to use of sacrificial support structures and increase the manufacturing cost. This paper presents an AM-restrained topology optimization approach based on the overhang sensitivity analysis. The overhangs can be explicitly expressed by the design variable and considered to be a minimization goal of the optimization process, in which the overhang sensitivity is combined with other performance sensitivities to update design variables. The effectivity and robustness of the proposed method is demonstrated by the typical cantilever beam and the MBB beam, then validated through the fused deposition modelling(FDM) 3D printing.