Porosity-guided design of dual-phase TPMS structures for enhanced acoustic performance

With the advancement of additive manufacturing, triply periodic minimal surfaces (TPMS), characterized by complex geometry and advanced mechanical and functional properties, have become feasible to fabricate. The iso-surface value, a critical parameter, governs the internal complexity of these structures. However, limited research has focused on the impact of double iso-surface value on structure performance. In this work, the relationship between porosity and iso-surface value of TMPS is thoroughly investigated from single-phase to dual-phase by analyzing four representative TPMS structures. Based on this relationship, the sound absorption performances of dual-phase TPMS structure are studied. Structures with optimal acoustic performance are obtained with a target porosity constraint. The proposed approach provides new insights into iso-surface-aware TPMS design applications.