A level set‐based parameterization method for structural shape and topology optimization

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A level set method for shape and topology optimization of large‐displacement compliant mechanisms (2008, methodology): “However, in the previous work [41], we found that new holes still cannot be added inside the material domain during the optimization process, although the global reinitilizations have been eliminated in the remainder iterations.”
Integrated layout design of multi-component systems using XFEM and analytical sensitivity analysis (2012, methodology): “[16,17].”
Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed elements (2016, background): “and d is a scaling parameter factor which is chosen 2–4 times of the mesh size [45].”
A level set method for structural shape and topology optimization using radial basis functions (2009, methodology): “The ability to add new holes can be regarded as a significant improvement of the proposed method over the previous method [30].”