Additive Manufacturing of Continuous Fiber-Reinforced Polymer Composite Sandwich Structures with Multiscale Cellular Cores

作     者：Zhenhu Wang Yaohui Wang Jian He Ke Dong Guoquan Zhang Wenhao Li Yi Xiong 

作者机构：School of System Design and Intelligent ManufacturingSouthern University of Science and TechnologyShenzhen518055China Ningbo Institute of TechnologyBeihang UniversityNingbo315832China 

出 版 物：《Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)》 (中国机械工程学报（增材制造前沿）（英文）)

年 卷 期：2023年第2卷第3期

页      面：39-45页

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：supported by National Natural Science Foundation of China(Grant No.52105261) Shenzhen Science and Technology Inno-vation Committee of China(Grant No.JCYJ20210324104610028) Department of Education of Guangdong Province of China(Grant No.2022ZDZX3020) 

主　　题：Additive manufacturing Sandwich structures Continuous fiber-reinforced composites Foam materials 

摘      要：The use of composite sandwich structures with cellular cores is prevalent in lightweight designs owing to their superior energy-absorbing ***,current manufacturing processes,such as hot-press molding and mold pressing,require multiple steps and complex tools,thus limiting the exploration of advanced sandwich structure *** study reports a novel multi-material additive manufacturing(AM)process that allows the single-step production of continuous fiber-reinforced polymer composite(CFRPC)sandwich structures with multiscale cellular ***,the integration of CFRPC-AM and in situ foam AM processes provides effective and efficient fabrication of CFRPC panels and multiscale cellular cores with intricate *** cellular core design spans three levels:microcellular,unit-cell,and graded *** structures with a diverse set of unit-cell designs,that is,rhombus,square,honeycomb,and re-entrant honeycomb,were fabricated and their flexural behaviors were studied *** results showed that the sandwich structure with a rhombus core design possessed the highest flexural stiffness,strength,and specific energy *** addition,the effect of the unit-cell assembly on the flexural performance of the CFRP composite sandwich structure was *** proposed design and fabrication methods open new avenues for constructing novel and high-performance CFRPC structures with multiscale cellular cores that cannot be obtained using existing approaches.