Design and 4D Printing of Metamaterials with Repairability Mahdi Bodaghi1 1 Department of Engineering, Nottingham Trent University, NG11 8NS, UK, E-mail address: mahdi.bodaghi@ntu.ac.uk and https://www.ntu.ac.uk/staff-profiles/science-technology/mahdi-bodaghi Key Words: Shape memory polymers, Metamaterials, Elasto-plasticity, Finite element method, 4D printing Direct 4D printing of thermo-responsive shape memory polymers (SMPs) by the fused filament fabrication (FFF) method enables engineering elasto-plastic metamaterials with shape recovery and repairability [1, 2]. This talk covers how integrating conceptual design into structural integrity can engineer adaptive metamaterials with performance-driven functionality enabling autonomous shape transformations and reparability. The shape memory mechanism is explained based on the constitutive thermo-mechanics of SMPs, finite element modelling and topological philosophy. This innovative conceptual design and 4D printing is expected to play a crucial role in achieving metamaterials with shape transformation and recoverability, and repairability, facilitating the fabrication of resilient and sustainable meta-structures with notable benefits such as lower material/energy/labour usage for a sustainable future. REFERENCES [1] Bodaghi, M., Serjouei, A., Zolfagharian, A., Fotouhi, M., Rahman, H. and Durand, D., 2020. Reversible energy absorbing meta-sandwiches by FDM 4D printing. International Journal of Mechanical Sciences, 173, p.105451. [2] Bodaghi, M., Namvar, N., Yousefi, A., Teymouri, H., Demoly, F. and Zolfagharian, A., 2023. Metamaterial boat fenders with supreme shape recovery and energy absorption/dissipation via FFF 4D printing. Smart Materials and Structures, 32(9), p.095028.