Abstract
In the last period of time, lattice structures have been developed as a new type of lightweight material. Significant amount of work has been done to investigate the applications and properties of lattice cells. In many fields of activity, lattice cells are widely used as support structures leading to minimal support material usage. This paper presents a method to design lattice structure of a bracket based on the modal analysis and topology optimization.Traditional design approaches do not make the most of new manufacturing methods, like additive manufacturing, which are removing design constraints and opening up new possibilities.The optimal shape of a part is often organic and counterintuitive, so designing it requires a different approach. Topology optimization allows for specifying where supports and loads are located on a volume of material and lets the software find the best shape. Designers can easily perform lightweight structures, extract CAD shapes and quickly verify the optimized design.In this study, it is optimized the distribution of orthotropic lattice materials inside the shape of the bracket, having as objective to maximize the first natural frequency and a response constraint to keep 40% of the bracket mass. Numerical results demonstrate remarkable structural properties of conforming lattice structures obtained.
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