Development and Applications of 3D Printing-Processed Auxetic Structures for High-Velocity Impact Protection: A Review

Auxetic structures (AXSs) are a novel class of materials with unique mechanical deformation behavior associated negative Poisson ratio. The combination AXS configurations various types has unveiled wide field applications, including military high-velocity protection against explosions and ballistic projectiles. However, the characteristic geometric re-entrant model AXSs imposes limitations difficulties when using conventional manufacturing methods to assemble structure lattice. Additive (AM) recently been explored as more efficient cost-effective method fabricate AXSs, regardless type material. This review paper focuses on development applications AM processed AXSs. highlights significance great potential for this that can be produced relatively fast at low cost. advantages AXS/AM expected extend important industrial sectors, particularly armor, where feasibility products improved properties is critical. use offers viable solution overcome methods, thus greater design flexibility, cost efficiency, reduced material waste. aims contribute understanding current state-of-the-art future research prospects production AXS/AM.