考虑周向波形特性的航空管路弯曲成形起皱理论建模与临界成形半径分析  

Theoretical Wrinkling Modeling and Critical Forming Radius Analysis of Aviation Tube Bending Forming Considering Circumferential Waveform Characteristics

作　　者：刘衡 汪志能 宾光富 林伟明 林姚辰 马雁翔 LIU Heng;WANG Zhineng;BIN Guangfu;LIN Weiming;LIN Yaochen;MA Yanxiang(Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment,Hunan University of Science and Technology,Xiangtan,Hunan,411201;Zhejiang King-Mazon Intelligent Manufacturing Co.,Ltd.,Lishui,Zhejiang,321400;Zhejiang Province Key Laboratory of Aerospace Metal Tube Forming Technology and Equipment,Lishui,Zhejiang,321400)

机构地区：[1]湖南科技大学机械设备健康维护湖南省重点实验室,湘潭411201 [2]浙江金马逊智能制造股份有限公司,丽水321400 [3]浙江省航空航天金属导管塑性成形技术与装备重点实验室,丽水321400

出　　处：《中国机械工程》2023年第16期1982-1990,共9页China Mechanical Engineering

基　　金：浙江金马逊智能制造股份有限公司科技攻关项目(D1226);湖南省科技创新人才计划科技创新领军人才项目(2020RC4039)。

摘　　要：针对传统弯曲起皱理论模型忽略管材周向波形特性造成预测精度不高的难题,基于理论推导和参数拟合建立了管材起皱周向波形函数,结合管材弯曲应力特性建立了其成形起皱机理模型,采用有限元仿真以及实验方法验证了该理论模型的正确性。研究结果表明:新建理论模型的管材起皱预测准确度达到了94.5%,较传统模型提高了12%,改善了传统模型预测精度不高的难题;弯曲半径越小,管材越易起皱。工程中为避免起皱,临界弯曲成形半径不应小于1.89倍管道直径。The variation characteristics of the circumferential waveform of tubes were ignored by the traditional theoretical models of bending wrinkling,resulting in low prediction accuracy.Aiming at such a problem,the circumferential waveform functions of tube wrinkling wave were established based on parameter fitting method and theoretical derivation,the mechanism models of tube bending wrinkling were established in combination with the tube bending stress models.The correctness of the theoretical models were verified through the finite element simulations and experiments.The results show that the prediction accuracy of the new theoretical models for tube wrinkling reaches 94.5%,which is 12% higher than that of the traditional models and solves the problem of low accuracy of the traditional prediction models.In addition,the smaller the bending radius is,the easier it is for the tube to wrinkle.To avoid wrinkling,the critical bending forming radius should not be less than 1.89 times of the pipe diameter.

关 键 词：失稳起皱 临界变形 能量法 数值计算 

分 类 号：TG306[金属学及工艺—金属压力加工] V261[航空宇航科学与技术—航空宇航制造工程]