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Cantilever supported by two edges
3D ground structure (lattice) topology optimization
Rectangular cantilever domain suported along two vertical edges and loaded at the center of the facet opposite to the supports.
"GRAND3 — Ground structure based topology optimization for arbitrary 3D domains using MATLAB." T. Zegard and G. H. Paulino. Journal of Structural and Multidisciplinary Optimization 52(6), 2015.