... numerical instability problems (e.g., the checkerboard problem and mesh-dependency issue), additional filters are usually needed for density-based framework [ 39 ]. topology optimization multi-material structure step function discrete cosine series expansion computational mechanics...

... space dimensionality and facilitate the optimization of multi-material structural design problems, this study proposes an effective topological representation and dimensionality reduction approach based on the material-field series expansion (MFSE) model. In the proposed method, a specified number...