In 4 of 102 SIMP state solves the solver's stopping flag accepted true residuals 1.35–49.5x above tolerance; a recomputed-residual guard recovered all 102, at 2.5x the wall time of a fixed 1e-3 floor.
A parallel geometric multigrid method for adaptive topology optimization.Structural and Multidisciplinary Optimization, 66(10):225, 2023
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When a positive SIMP density floor is not enough: solver admissibility and guarded floor selection in matrix-free 3D topology optimization
In 4 of 102 SIMP state solves the solver's stopping flag accepted true residuals 1.35–49.5x above tolerance; a recomputed-residual guard recovered all 102, at 2.5x the wall time of a fixed 1e-3 floor.