摘要
研究了汽车用铝合金板材电磁成形塑性变形过程,采用LS-DYNA有限元分析软件进行1 mm厚的AA6014铝合金板材电磁成形变形过程的分析,并将模拟结果与实验结果进行对比分析。结果表明,板料首先在对应线圈半径的1/2附近开始变形,然后由于惯性作用带动中心区域材料进行变形,直至板料的初始动能逐渐耗散,最终变形为一个类似锥形件。当电容为2370μF,电压分别为4和3 kV时,电磁成形实验深度测量结果为49.61和40.26 mm,模拟结果为48.25和35.11 mm;板料变形最大区域的厚度实验结果为0.71和0.78 mm,模拟结果为0.70和0.79 mm,实验与模拟结果的厚度误差为0.01 mm。通过研究结果对比分析,获得了铝合金电磁成形塑性变形的过程,进一步为铝合金电磁成形工艺研究和应用提供了参考。
The plastic deformation process of electromagnetic forming for automotive aluminum alloy sheet was studied.Electromagnetic forming deformation process of AA6014 aluminium alloy sheet for 1 mm thickness was analyzed by LS-DYNA finite element analysis software,and the simulation results were compared with the experimental ones.The results show that the sheet metal near the corresponding half radius of coil is deformed firstly,and then material in center area is deformed by inertial effect.The part similar to cone is ultimately obtained when the initial kinetic energy of sheet is exhausted eventually.When voltage is 4 and 3 kV with capacitance of 2370μF,for depth of electromagnetic forming,the experimental result is 49.61 and 40.26 mm,and the simulation result is 48.25 and 35.11 mm,respectively;for the thickness of the maximum deformation area of the sheet,the experimental result is 0.71 and 0.78 mm,and the simulation result is 0.70 and 0.79 mm,respectively,and the error of thickness is 0.01 mm.Through the contrastive analysis of the results,the electromagnetic forming plastic deformation process of aluminum alloy is obtained which can further provid reference for research and application of the electromagnetic forming technology for aluminum alloy.
作者
金飞翔
吕刚
谷曼
翟月雯
JIN Fei-xiang;LüGang;GU Man;ZHAI Yue-wen(Department of Mechanical Engineering,Hefei University,Hefei 230601,China;Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.,Beijing 100083,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2019年第1期109-115,共7页
Journal of Plasticity Engineering
基金
国际科技合作与交流专项资助项目(2015DFA71080)
安徽省高校自然科学研究重点项目(KJ2018A0553)
合肥学院人才项目(16-17RC23)
关键词
电磁成形
铝合金
LS-DYNA
有限元
塑性变形
electromagnetic forming
aluminum alloy
LS-DYNA
finite element
plastic deformation
