期刊
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
卷 61, 期 6, 页码 2423-2435出版社
SPRINGER
DOI: 10.1007/s00158-020-02607-2
关键词
Support structures; Additive manufacturing; Easy removal; Overhang constraint; Topology optimization
资金
- National Natural Science Foundation of China [51705311]
This paper presents a density-based topology optimization approach to design easy-removal support structures for additive manufacturing (AM). First, a multi-field structural parameterization is proposed for topology optimization by considering AM filtering technique that ensures the physical design being self-support. An easy-removal constraint is developed to generate porous structural patterns in the contact region between the support structures and its surroundings. An improved formulation is further proposed to prevent obtaining impractical solutions which contain one-node connection in the structural members. Besides, an overhang constraint and a design-dependent self-weight load are considered. As a result, the optimized support structures are self-support, able to support the overhang regions of the given prototype and possesses excellent mechanical properties to bear the self-weight of the entire AM part. It can be easily removed from both the prototype and the baseplate. Numerical examples and discussions are given to demonstrate its effectiveness and applicability.
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