Spatially-graded 3D-printed viscoelastic truss metamaterials for impact trajectory control and energy absorption

作     者：Kaoutar Radi Raphaël N.Glaesener Siddhant Kumar Dennis M.Kochmann Kaoutar Radi;Raphaël N.Glaesener;Siddhant Kumar;Dennis M.Kochmann

作者机构：Mechanics&Materials LabDepartment of Mechanical and Process EngineeringETH Zürich 8092Switzerland Mechanics&Materials Computing LabDepartment of Materials Science&EngineeringTU Delft 2628 CNNetherlands 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2024年第14卷第5期

页      面：378-385页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Metamaterial 3D Printing Viscoelasticity Impact Truss Finite element method 

摘      要：This study demonstrates that two-and three-dimensional spatially graded,truss-based polymeric-material metamaterials can be designed for beneficial impact mitigation and energy absorption *** a combination of numerical and experimental techniques,we highlight the broad property space of periodic viscoelastic trusses,realized using 3D printing via selective laser *** beyond periodic designs,we investigate the impact response of spatially variant viscoelastic lattices in both two and three *** result reveal that introducing spatial variations in lattice topology allows for redirecting of the impact trajectory,opening new opportunities for engineering and tailoring lightweight materials with target impact *** is achieved through the combined selection of base material and metamaterial design.