A Novel Mathematical Formulation for Density-Based Topology Optimization Method Considering Multi-Axis Machining Constraint

• Main Authors: Deng, H. (Author), To, A.C (Author)
• Format: Article
• Language: English
• Published: American Society of Mechanical Engineers (ASME) 2022
• Subjects: cam design; Cam design; Computer aided analysis; Computer aided design; computer-aided design; Computer-aided design; conceptual design; Conceptual design; density-based method; Density-based method; design optimization; Design optimization; Functions; length to diameter (L:D) ratio; Length to diameter ratio; Machining centers; multi-axis machine; Multiaxis machines; Multi-axis machining; Sensitivity analyse for design; Sensitivity analysis; sensitivity analysis for design; Structural optimisations; structural optimization; Structural optimization; Topology; Topology optimisation; topology optimization
• Online Access: View Fulltext in Publisher
• ISBN: 10500472 (ISSN)
• DOI: 10.1115/1.4053333

This paper proposes a novel density-based method for structural design considering restrictions of multi-axis machining processes. A new mathematical formulation based on Heaviside function is presented to transform the design field into a geometry which can be manufactured by multi-axis machining process. The formulation is developed for 5-axis machining, which can be also applied to 2.5D milling restriction. The filter techniques are incorporated to effectively control the minimum size of void region. The proposed method is demonstrated by solving the compliance minimization problem for different machinable freeform designs. The length to diameter (L:D) ratio geometric constraint is introduced to ensure the machinable design, where deep hole or narrow chamber features are avoided using proposed method. Several two- and three-dimensional numerical examples are presented and discussed in detail. © 2022 by ASME