CFRP管钻孔加工中管径对钻削轴向力与损伤特性的影响  

Influence of Pipe Diameter on Thrust Force and Damage Characteristics During CFRP Pipe Drilling

作　　者：李树健 戴隆宇 邹适 李常平 李鹏南[1] 邱新义[1] LI Shujian;DAI Longyu;ZOU Shi;LI Changping;LI Pengnan;QIU Xinyi(Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学,湘潭411201

出　　处：《航空制造技术》2022年第22期36-43,共8页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(51975208,52105442,52275423,51905169);湖南省自然科学基金(2020JJ4301)。

摘　　要：CFRP管制造的传动轴具有优越的性能,被广泛应用于无人机和新能源汽车等高新技术领域。CFRP管中,非轴向分布纤维的屈曲程度决定其初始弯曲应力,并对其钻削过程中的轴向力和加工损伤产生影响。建立了CFRP管的钻削有限元仿真模型,并进一步结合仿真和试验,研究了管径大小对CFRP管钻削轴向力和损伤的影响。结果表明,本文所建立的CFRP管钻削有限元模型具有较高的可靠性;CFRP管的钻削出、入口易在螺旋槽的剥离力和钻头轴向力的作用下产生严重的推出分层和剥离分层,最大钻削轴向力随管径的增大而呈现先减小后增大的“V”型变化趋势;钻削出口存在明显的毛刺和分层损伤,分层损伤因子随管径的增加变化幅度较小;钻削入口的材料剥离长度和钻削出口的材料最大挠度均随管径的增大而增大;最先与钻头接触的材料最大应力随管径增加呈先减小后增加的变化趋势,在管内径为12 mm时应力达到最小。The transmission shaft made of CFRP pipe is widely used in high-tech fields such as UAV and new energy vehicles because of the excellent performances.The buckling degree of non-axially distributed fibers in CFRP pipe determines its initial bending stress,which afects the axial force and machining damage during drilling process.In this presented paper,a finite element simulation model of CFRP pipe drilling is established,and the influence of pipe diameter on the thrust force and damage characteristics during CFRP pipe drilling is further studied by combining with simulation and experiment.The results show that the established finite element model of CFRP pipe drilling has high reliability.The drilling outlet and inlet of CFRP pipe are easy to produce serious push out delamination and peel delamination under the action of the stripping force of spiral groove and the axial force of drill bit.The drilling axial force and outlet delamination damage show a “V” trend with the increase of pipe diameter.There are obvious burr and delamination damage at the drilling outlet,and the delamination damage factor changes slightly with the increase of pipe diameter.The stripping length of the material at the drilling inlet and the maximum deflection of the material at the drilling outlet increase with the increase of the pipe diameter.The maximum stress of the material that contacts the drill bit first decreases first and then increases with the increase of pipe diameter,and reaches the minimum when the inner diameter of the pipe is 12 mm.

关 键 词：CFRP管 管径 有限元仿真 轴向力 钻削损伤 

分 类 号：TB33[一般工业技术—材料科学与工程]