Multiscale concurrent topology optimization for large-scale assembled structures
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Additive manufacturing of large-scale structures is limited by printer size, often necessitating partitioning that degrades mechanical performance. This study proposes a two-scale concurrent topology optimization framework for assembled structures under component size constraints. At the macroscale, structural topology and partitioning are simultaneously optimized via a size-constrained SIMP formulation. At the microscale, homogenization-based optimization designs self-connected microstructures within components and assembled microstructures with bolted joints at interfaces, while geometric compatibility ensures smooth transitions. Numerical examples and a printing–assembly demonstration validate the proposed method.
