A systematic review of design for additive manufacturing of aerospace lattice structures: Current trends and future directions

Lattice structures, produced by repeated unit cells in the particular pattern, offer a high strength-to-weight ratio. The current advancement in Additive manufacturing (AM) technology, creating complex geometries like lattice structures has revolutionized production across various industries. While several reviews have focused on different specific aspects of lattice structures, a comprehensive overview of recent advancements of lattice in aerospace structural applications is lacking. Therefore, a comprehensive review of lattice structures used in aerospace lightweight applications manufactured through AM is presented here. Basic classification of lattice structure is presented followed by detailed study of several factors influencing mechanical properties of lattice structures, crucial for aerospace lightweight application. Current trends in manufacturing technologies of lattice structures are analyzed in detail with identification of capabilities and limitations. Furthermore, detailed literature on the lattice structure optimization techniques is presented with current limitations. Furthermore, the engineering applications of lattice structures in aerospace lightweight, along with the fabrication processes involved, challenges in applications of lattice in aerospace applications and future research directions are reported. By providing insights into current research trends and future directions, this review serves as a valuable resource for researchers and engineers involved in the design and development of lightweight aerospace lattice structures. It lays the groundwork for the exploration of new and innovative lattice structures tailored to meet the evolving needs of the aerospace industry.