Revealing the apparent and local mechanical properties of heterogeneous lattice: a multi-scale study of functionally graded scaffold

Functionally graded scaffold (FGS) can flexibly regulate the mechanical properties of bone and holds great promise for offering multifunctional responses orthopaedic implants. Heterogeneous FGSs constructed by skeletal sheet triply periodic minimal surfaces (TPMSs) have been proposed in this study. The diversified deformation mechanisms TPMS-FGSs showed superior stability, energy absorption efficiency was enhanced 3.0–79.0% 2.6–16.8% compared to uniform TPMS, respectively. structure altered large-scale 45° shear failure layer-wise or zigzag mode. Moreover, comprehensive reformation strain distribution crack propagation transition region under small compressive experimentally numerically studied. results shed light on global local regulation mechanism TPMS-FGS.