Investigation on the Interlaminar Strengthening Mechanism of Continuous Fiber Additive Manufacturing Based on Laser In-situ Preheating

被引：0
|
作者：
Chen Y. [1 ]
Shan Z. [1 ]
Fan C. [1 ,2 ]
Song Y. [1 ]
Song W. [2 ,3 ]
机构：
[1] College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] National Engineering Research Center for Dyeing and Finishing of Textiles, Taian
[3] College of Material Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2024年 / 60卷 / 01期
关键词：
additive manufacturing; birth-death element; continuous fiber; interlaminar strengthening; laser preheating;
D O I：
10.3901/JME.2024.01.044
中图分类号：
学科分类号：
摘要：
Continuous fiber reinforced composites additive manufacturing has the advantages of high forming freedom, high material utilization rate and low die dependency, which can realize the rapid and low-cost integrated manufacturing of composite materials and satisfy the short-cycle and high-performance forming requirements in aerospace and other fields. However, the layer-by-layer stacking form leads to poor interlaminar performance, which easily induces delamination in the long-term service and seriously limits its wide application. In this study, a continuous fiber additive manufacturing forming method based on laser in-situ preheating is proposed. By establishing a finite element simulation model based on the "life and death element" technology, the temperature distribution and evolution on additive manufacturing are revealed, and its effective performance on improving the interlaminar performance of formed parts is verified through experiments. Finally, the interlaminar strengthening mechanism of laser preheating is obtained. The results show that laser preheating can rapidly heat the surface and internal temperature of the sample, promote the bonding of resin between layers and the remelting and impregnation of internal wire materials. Compared with the sample without preheating, the interlaminar shear strength of the preheated sample is increased up to 115%. © 2024 Chinese Mechanical Engineering Society. All rights reserved.
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页码：44 / 53
页数：9
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