A system and method is provided that facilitates finite element analysis of parts having variable spatial density graded regions produced via a 3D printer. A processor may receive at least one input through the input device that specifies a gradation pattern for variation in spatial density in at least one direction in at least one region of a 3D-model of the part. The processor may also carry out the simulation via finite element analysis for the 3D-model of the part based at least in part on simulation parameters and the gradation pattern for the at least one region, to produce simulation results involving the part having graded spatial density in the at least one region. The processor may also generate a configuration for the 3D printer that drives the 3D printer to additively build the part based on the 3D-model having the graded spatial density in the at least one region.
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