3D Printed Forms and Products Design Sprout 3D Printed Bicycle by JunXiang Cheng Through the topology optimization of the bicycle frame deployment, and then according to the corresponding optimization results, the optimization of the corresponding frame prototype is completed, and then the bicycle is produced by 3D printing. The topology-optimized bicycle frame not only reasonably plans the material structure distribution , but also reduces the energy consumption rate and the emission of harmful substances in production.