Influence of manufacturing process-induced geometrical defects on the energy absorption capacity of polymer lattice structures

作     者：Alexandre Riot Enrico Panettieri Antonio Cosculluela Marco Montemurro Alexandre Riot;Enrico Panettieri;Antonio Cosculluela;Marco Montemurro

作者机构：Universite de BordeauxArts et Metiers Institute of TechnologyCNRSINRABordeaux INPHESAM UniversiteI2M UMR 5295F-33405 TalenceFrance French Atomic Energy CommissionRoute des GargailsCedexF-33114Le BarpFrance 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2024年第35卷第5期

页      面：47-59页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Direction Générale de l’Armement, DGA l’Energie Atomique et aux Energies Alternatives 

主　　题：Lattice structures Architected cellular materials Dynamic simulation Energy absorption Geometrical imperfection Additive manufacturing 

摘      要：Modern additive manufacturing processes enable fabricating architected cellular materials of complex shape,which can be used for different *** them,lattice structures are increasingly used in applications requiring a compromise among lightness and suited mechanical properties,like improved energy absorption capacity and specific stiffness-to-weight and strength-to-weight ratios.A dedicated modeling strategy to assess the energy absorption capacity of lattice structures under uni-axial compression loading is presented in this *** numerical model is developed in a non-linear framework accounting for the strain rate effect on the mechanical responses of the lattice *** geometries,i.e.,cubic body centered cell,octet cell,rhombic-dodecahedron and truncated cuboctahedron 2+,are ***,the influence of the relative density of the representative volume element of each geometry,the strain-rate dependency of the bulk material and of the presence of the manufacturing process-induced geometrical imperfections on the energy absorption capacity of the lattice structure is *** main outcome of this study points out the importance of correctly integrating geometrical imperfections into the modeling strategy when shock absorption applications are aimed for.