Geometric Accuracy and Energy Absorption Characteristics of 3D Printed Continuous Ramie Fiber Reinforced Thin-Walled Composite Structures  

作　　者：Kui Wang Hao Lin Antoine Le Duigou Ruijun Cai Yangyu Huang Ping Cheng Honghao Zhang Yong Peng 

机构地区：[1]Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic and Transportation Engineering,Central South University,Changsha 410075,China [2]Institute de Research Dupty de Lôme,Bionics Group,University of South Britany,Lorient F-56100,France [3]ICUBE Laboratory-CNRS,University of Strasbourg,Strasbourg 67000,France [4]Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education),School of Mechanical Engineering,Shandong University,Jinan 250061,China.

出　　处：《Chinese Journal of Mechanical Engineering》2023年第6期147-158,共12页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.51905555,52105523);Hu-Xiang Youth Talent Program of China(Grant No.2020RC3009);Innovation-Driven Project of Central South University of China(Grant No.2019CX017).

摘　　要：The application of continuous natural fibers as reinforcement in composite thin-walled structures offers a feasible approach to achieve light weight and high strength while remaining environmentally friendly.In addition,additive manufacturing technology provides a favorable process foundation for its realization.In this study,the printability and energy absorption properties of 3D printed continuous fiber reinforced thin-walled structures with different configurations were investigated.The results suggested that a low printing speed and a proper layer thickness would mitigate the printing defects within the structures.The printing geometry accuracy of the structures could be further improved by rounding the sharp corners with appropriate radii.This study successfully fabricated structures with vari-ous configurations characterized by high geometric accuracy through printing parameters optimization and path smoothing.Moreover,the compressive property and energy absorption characteristics of the structures under quasi-static axial compression were evaluated and compared.It was found that all studied thin-walled structures exhibited progressive folding deformation patterns during compression.In particular,energy absorption process was achieved through the combined damage modes of plastic deformation,fiber pullout and delamination.Furthermore,the com-parison results showed that the hexagonal structure exhibited the best energy absorption performance.The study revealed the structure-mechanical property relationship of 3D printed continuous fiber reinforced composite thin-walled structures through the analysis of multiscale failure characteristics and load response,which is valuable for broadening their applications.

关 键 词：Additive manufacturing Continuous fiber BIOCOMPOSITE Thin-walled structure Geometric accuracy Energy absorption 

分 类 号：TB332[一般工业技术—材料科学与工程]