摘要
针对磨料水射流对三维编织复合材料的冲蚀过程,利用Hypermesh/Ls-Dyna有限元分析软件建立磨料水射流冲蚀复材模型,以射流压力、走刀速度、横向进给量为变量开展仿真分析,得出不同工艺参数下材料的去除深度与质量以及材料的应力变化情况,完成水射流铣削三维编织复合材料的工艺过程模拟。研究发现,随着射流压力的增加,复合材料平均铣削深度和Z向最大应力不断增加,当射流压力超过70 MPa时材料被击穿;随着走刀速度和横向进给量的增大,平均铣削深度和材料Z向最大应力呈不断减小趋势;材料铣削深度主要受射流压力的影响,其次是走刀速度,而横向进给量对深度影响较小;铣削面质量主要受横向进给量的影响,当横向进给量大于或小于喷嘴直径时,铣削面会出现峰谷现象,而等于喷嘴直径时铣削面质量较好。根据仿真结果开展试验研究,将试验结果与仿真结果进行对比分析,验证了仿真模型的可行性与有效性。
For abrasive water jet on the erosion process of 3d braided composites,Hypermesh/Ls-Dyna finite element analysis software is used to establish abrasive water jet erosion model of composites with jet pressure,feeding speed,the transverse feed as the variable to carry out the simulation analysis.The removal depth,milling surface quality and stress variation of the material under different process parameters are obtained,and the process simulation of waterjet milling 3D braided composites is completed.It was found that with the increase of jet pressure,the average milling depth and z-direction maximum stress of the composite material increased continuously.When the jet pressure exceeded 70 MPa,the material was broken down.With the increase of cutting speed and transverse feed,the average milling depth and the maximum stress in material Z direction are decreasing.The depth of material milling is mainly affected by the jet pressure,followed by the cutting speed,and the transverse feed has little influence on the depth.The milling surface quality is mainly affected by the transverse feed quantity.When the transverse feed quantity is greater than or less than the nozzle diameter,the milling surface quality will appear peak and valley phenomenon,while when it is equal to the nozzle diameter,the milling surface quality is better.Experimental research is carried out according to the simulation results,and the experimental results are compared with the simulation results to verify the feasibility and effectiveness of the simulation model.
作者
尹东杨
陈晓川
鲍劲松
YIN Dongyang;CHEN Xiaochuan;BAO Jinsong(College of Mechanical Engineering,Donghua University,Shanghai 201620)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2021年第5期273-280,共8页
Journal of Mechanical Engineering
