Non-parametric geometry patching technique for MMC topology optimization

MMC is one of the topology optimization methods that provides explicit boundary description of the optimized topology. However, due to the inherent nature of MMC, the obtained geometry could exhibit distinct local singularities. To cope with this issue, a non-parametric geometry patching technique for MMC is developed. A moving node patching technique for both 2D and 3D cases is developed in conjunction with MMC to obtain structures with smooth boundaries. Numerical examples in 2D and 3D are presented to demonstrate the effectiveness of the proposed approach.