摘要
采用有限元分析方法对附加超声冲击下电弧增材制造2219铝合金的过程进行数值模拟,并研究了其应力场变化以及工件变形情况的变化.结果表明,附加超声冲击能使多层多道沉积过程中沉积件边缘处以及基板中靠近沉积件的区域的应力集中程度下降.多层多道沉积过程中附加超声冲击能有效降低沉积件内部的应力.在附加超声冲击后道间交界处的应力范围由156.1~211.6 MPa下降至138.8~181.9 MPa,表面平均残余应力下降22.3%.附加超声冲击下,多层多道电弧增材构件最大变形量由0.61 mm下降至0.53 mm,平均变形量由0.33 mm下降至0.27 mm.试验实际测量所得的与有限元计算的多层多道沉积件上表面的应力分布规律相近,证明模拟结果的可靠.创新点:(1)建立了多层多道电弧增材有限元模型,并合理地简化超声冲击载荷.(2)利用超声冲击可显著降低电弧增材制造残余应力和变形.
The finite element analysis was used to numerically simulate the process of arc additive manufacturing of 2219 aluminum alloy under ultrasonic impact,and the changes in stress fields and component deformation were studied.The results show that the additional ultrasonic impact can reduce the stress concentration at the edge of the sediment and at the area close to the sediment in the substrate during the multi-layer multi-channel deposition.Additional ultrasonic impact during multi-layer multi-channel deposition can effectively reduce the stress inside the sediment.After the ultrasonic impact,the stress range at the interface between layers decreased from 156.1−211.6 MPa to 138.8−181.9 MPa,and the average residual stress on the surface decreased by 22.3%.Under the ultrasonic impact,the maximum deformation of multi-layer multi-pass arc additive component decreased from 0.61 mm to 0.53 mm,and the average deformation decreased from 0.33 mm to 0.27 mm.The stress distribution on the upper surface of the multi-layer sediment calculated by the finite element is similar to that of the measured in actual experiment,which proves that the simulation results are reliable.Highlights:(1)A finite element model for multi-layer multipass arc additive manufacturing is established,and the ultrasonic impact load is reasonably simplified.(2)The application of ultrasonic impact can significantly reduce the residual stress and deformation of arc additive manufactured components.
作者
梁晖
李攀
沈鑫
陈力帆
戴俊辉
李东
杨东青
LIANG Hui;LI Pan;SHEN Xin;CHEN Lifan;DAI Junhui;LI Dong;YANG Dongqing(Key Laboratory of Controlled Arc Intelligent Additive Technology,Ministry of Industry and Information Technology,Nanjing University of Science and Technology,Nanjing,210094,China;China North Industries Group,Jinxi Industrial Group Co.,Ltd.,Taiyuan,030000,China;Guangdong Key Laboratory of Advanced Welding Technology for Ships,CSSC Huangpu Wenchong Shipping Co.,Ltd.,Guangzhou,510715,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2023年第10期79-85,119,I0007,共9页
Transactions of The China Welding Institution
基金
中国博士后科学基金资助项目(2020M682930)
国家自然科学基金资助项目(52105367)
江苏省博士后资助计划项目(2021K591C).
关键词
超声冲击
2219铝合金
电弧增材制造
有限元分析
ultrasonic shock
2219 aluminum alloy
wire arc additive manufacturing
finite element analysis
