Exit morphology and mechanical property of FDM printed PLA: influence of hot melt extrusion process
作者机构：Institute of MechanicsChinese Academy of SciencesBeijing100190People’s Republic of China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing100049People’s Republic of China Research Institute of 3D PrintingBeijing City UniversityBeijing100083People’s Republic of China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049People’s Republic of China
出 版 物：《Advances in Manufacturing》 (先进制造进展（英文版）)
年 卷 期：2023年第11卷第1期
页 面：56-74页
核心收录：
学科分类：1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0801[工学-力学（可授工学、理学学位）]
基 金：This work was supported by the National Natural Science Foundation of China(Grant Nos.11502269 and 11672304) plan of Beijing Municipal Commission of Science and Technology(Grant No.Z181100003818015)
主 题：Fused deposition modeling(FDM) Polylactic acid(PLA) Exit morphology Tensile property Printing process window
摘 要：In order to study the hot melt extrusion process in fused deposition modeling(FDM),this study mainly explores the effects of printing temperature,heated block length,feeding speed on the exit morphology and mechanical properties of FDM printed Polylactic acid(PLA)***-speed camera is used to capture the exit morphology of molten PLA just extruded to the *** to exit morphology,the outlet states of extruded molten material can be divided into four categories,namely,bubbled state,coherent state,expanding state,and unstable *** test results show that printing temperature,heated block length and printing speed have significant influence on tensile properties and fracture mode of FDM printed *** the heated block length is 15 mm and 30 mm,there is a ductile-brittle transition in fracture mode with the increase of printing *** printing process window under different heated block lengths and printing temperatures has been figured out and the distribution of printing process window under different printing speeds has been *** is a maximum printing process window under the heated block length of 30 *** finding provides a frame work for performance prediction of FDM printed parts and theoretical guidance for expanding the scope of printing process window.
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