Multimaterial stress-constrained topology optimization with multiple distinct yield criteria

Composite structures offer unique mechanical and physical properties enabled by material heterogeneity. To harness these in stress-constrained topology optimization, the incorporation of multiple materials is necessary. Established studies field typically assume same yield criterion for all candidate while vary their stiffness strengths. open up full design capability composite structures, we propose a novel function interpolation scheme that allows simultaneous distinct criteria Built upon this scheme, introduce optimization formulation handles with elastic properties, strengths, simultaneously. We investigate several two-dimensional three-dimensional cases objective minimizing total volume subjected to stress constraints. The optimized designs reveal fundamental advantages heterogeneity, including space enlargement, deconcentration effect, exploitation tension–compression strength asymmetry. These lead 10?40% reduced minimized volumes as compared single-material provide new insights discovery more efficient structures.