Study on Automated Placement Setting Agent and Placement Process of Dry Fiber  

干纤维自动铺放定型剂与铺放工艺研究

作　　者：WANG Haoyu SUN Ying CHEN Haoran AN Luling DUAN Shaohua WANG Xianfeng 王浩宇;孙颖;陈浩然;安鲁陵;段少华;王显峰(南京航空航天大学机电学院,南京210016;成都飞机工业(集团)有限责任公司,成都610000;南京航空航天大学材料科学与技术学院,南京211106)

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China [2]AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd.,Chengdu 610000,P.R.China [3]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2025年第1期112-122,共11页南京航空航天大学学报(英文版)

基　　金：supported by Jiangsu Provincial Key Research and Development Program(No.BE2023014-4).

摘　　要：During the automated placement process of dry fibers,the positioning and fixation of dry fiber gauze belts are achieved by spraying setting agents.The amount of the setting agent is difficult to control when it is sprayed manually.Furthermore,it can also affect the permeability of the preform,resin injection and the quality of the vacuum assisted resin infusion(VARI)molding,resulting in a decrease in the mechanical properties of composite materials.This study utilizes dry fiber automated placement equipment and an automated spraying system to manufacture preform structures,followed by VARI process to prepare composite samples with varying setting agent contents.Subsequently,mechanical characterization including interlaminar shear,bending and tensile testing is conducted to investigate the influence of setting agent content on both the manufacturing process and the mechanical properties of composite products.The results show that the interlaminar shear strength,bending strength and tensile strength of the sample gradually decrease with the increase of the content of the setting agent.The optimal setting agent content for automated laying of dry fiber is determined to be 4%-6%,balancing the preformed body’s layup quality and its impact on mechanical properties.Compared with agent-free samples,this range results in reductions of 3% in interlaminar shear strength,9% in bending strength,11% in bending modulus,and 13%-16% in tensile strength.在干纤维自动铺放过程中,需通过喷涂定型剂来定位和固定干纤维纱带。人工进行定型剂的喷涂时,定型剂用量难以控制,定型剂的用量还会影响预成形体的渗透性,影响树脂的灌注,进而造成缺陷;也会影响真空辅助树脂注塑(Vacuum assisted resin infusion,VARI)成形的质量,从而引起复合材料制件力学性能的下降。本文采用干纤维自动铺放设备和自动喷胶设备进行预成形体自动铺放,并通过VARI成形工艺,制备不同定型剂含量的复合材料制品,然后进行层间剪切、弯曲、拉伸等力学性能测试,探究定型剂用量对VARI成形工艺和复合材料制品力学性能的影响。结果表明,随着定型剂含量的增加,样品的层间剪切、弯曲与拉伸强度逐渐降低。定型剂含量在4%~6%时,定型剂含量能获得较好的自动铺放成形定型效果,同时对试样的力学性能影响较小,与不含定型剂的试样相比,其层间剪切强度低3%,抗弯强度低9%,弯曲模量降低了11%,拉伸强度降低了13%~16%。

关 键 词：automated placement technology of dry fiber room temperature setting agent preform preparation vacuum assisted resin infusion(VARI)molding 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]