Cementitious composites reinforced with 3D printed functionally graded polymeric lattice structures: Experiments and modelling

Cementitious materials are widely used in construction. For their low ductility, they typically need to be reinforced by steel rebars, which cause potential corrosion problems. Polymeric reinforcement, does not have problems, has been replace rebars. However, a relatively high reinforcing ratio is usually required for the cementitious composites conventional polymeric reinforcement. Owing customizability of 3D printing technology, reinforcement with functionally graded structure able manufactured, significantly reduces meanwhile improves mechanical properties. In this present study, printed octet lattice structures were as develop enhanced ductility. Four-point bending experiments performed on plain mortar, and specimens finite element model was simulate numerically. A good agreement between simulations found: increased flexural ductility comparing mortar. Composites vertically lower while exhibiting obviously higher normalized addition, fracture behavior evaluated using energy based analytical model. The analysis shows that, from perspective release, steady state cracking criteria satisfied developed study so that multiple strain hardening obtained. according numerical predictions, increasing strength material 40% would allow these behaviors potentially achieved. This work additive manufacturing great developing reduce enhance