Topology optimization with a closed cavity exclusion constraint for additive manufacturing based on the fictitious physical model approach
This addresses manufacturing constraints in additive manufacturing for engineering design, but appears incremental as it builds on existing topology optimization and fictitious physical model approaches.
This paper tackles the problem of designing structures for additive manufacturing by proposing a topology optimization method that excludes closed cavities, which can cause manufacturing defects. The method is validated through numerical examples showing it effectively produces manufacturable designs.
This paper proposes a topology optimization method that considers the geometric constraint of no closed cavities to improve the effectiveness of additive manufacturing based on the fictitious physical model approach. First, the basic topology optimization concept and level set-based method are introduced. Next, the fictitious physical model for a geometric constraint in the topology optimization framework is discussed. Then, a model for the geometric constraint of no closed cavities for additive manufacturing is proposed. Numerical examples are provided to validate the proposed model. In addition, topology optimization considering the geometric constraint is formulated, and topology optimization algorithms are constructed using the finite element method. Finally, optimization examples are provided to validate the proposed topology optimization method.