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摘要：
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运用弯曲成形理论与塑性力学知识，分析母线弯曲过程中翘曲的产生机理，并对其进行力学分析。利用能量法推导出临界压应力的解析表达式，研究发现，母线立弯时翘曲的发生与材料的力学性能和几何参数有关；进一步研究了厚度对压应力的影响后发现，随着厚度的增加，压应力增大，母线抵抗失稳翘曲的能力增强。通过对1060铝排进行立弯试验，得到材料厚度与翘曲的变化规律，验证了厚度对于母线失稳翘曲的影响，这与推导表达式的结果是一致的，这一研究为抑制母线立弯成形过程中产生的翘曲缺陷提供了理论依据，具有一定的参考价值。
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The generation mechanism of warpage in the bending process of busbar was analyzed by bending theory and plastic mechanics knowledge，and the mechanical analysis was carried out. Then, the analytical expression of critical compressive stress was derived by the energy method. And the study finds that the warpage of busbar during the vertical bending is related to the mechanical properties and geometric parameters of material. Furthermore, the influence of thickness on the compressive stress was researched. The results show that with the increasing of thickness, the compressive stress increases, and the ability of busbar resistance to instability and warpage is enhanced. Through the vertical bending test of 1060 aluminum busbar, the change laws of material thickness and warpage are obtained, and the influence of thickness on the instability and warpage of busbar is verified which is consistent with the result of derivate expression. Thus, the above study provides a theoretical basis for restraining the warpage defects in the vertical bending process of busbar and has a certain reference value.
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基金项目：
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作者简介：
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陈丽（1995-），女，硕士研究生，E-mail：2430070029@qq.com；通讯作者：樊瑜瑾（1962-），男，博士，教授，硕士研究生导师，E-mail：fanyujinkmust@163.com
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参考文献：
|
[1]屠海令,马飞,张世荣, 等.我国新材料产业现状分析与前瞻思考[J].稀有金属,2019,43(11):1121-1130.
Tu H L, Ma F, Zhang S R, et al. Current status and future insight of new materials industry in China[J]. Chinese Journal of Rare Metals, 2019,43(11):1121-1130.
[2]叶泽刚.板料V形自由弯曲力的工程算法[J].中国机械工程, 2006, 17(S1): 60-62.
Ye Z G. Engineering calculation of air bending force for sheet-metal V-shape [J].China Mechanical Engineering, 2006, 17(S1): 60-62.
[3]Chudasama M K, Raval H K. Bending force prediction for dynamic roll-ending during 3-roller conical bending process[J]. Journal of Manufacturing Processes, 2013,(9): 1-12.
[4]Neskorodev R N. Representation of the solution of refined bending theory for isotropic plates [J]. Mechanics of Solids, 2014, 49(4): 413-421.
[5]江涛,章青.中厚板弯曲问题的自然单元法[J].固体力学学报, 2009, 30(4):424-431.
Jang T, Zhang Q. Natural element method for the bending problem of moderately thick plate [J]. Chinese Journal of Solid Mechanics, 2009, 30(4): 424-431.
[6]王春玲,张杰,李华.四边自由各向异性矩形中厚板弯曲解析解[J]. 计算力学学报,2018, 35(4):521-526.
Wang C L, Zhang J, Li H. Analytic solutions for bending of anisotropic rectangular medium-thickness plate with four free edges [J]. Chinese Journal of Computational Mechanics, 2018, 35(4): 521-526.
[7]陈英杰,宋小惠.应用修正的功的互等法求解大挠度矩形薄板弯曲问题 [J]. 塑性工程学报, 2018, 25(2): 175-182.
Chen Y J, Song X H. Problem of the bending of large deflection rectangular thin plate solved by applying corrected reciprocal method[J]. Journal of Plasticity Engineering,2018, 25(2): 175-182.
[8]胡丽华,傅旻,樊新乾.板料弯曲成形性能的有元模拟研究[J]. 模具工业, 2013, (1): 25-28.
Hu L H, Fu M, Fan X Q. Finite element simulation study of bending forming performance of sheet metal [J]. Die & Mould Industry, 2013, (1): 25-28.
[9]Xu Q L, Ji T G, Jiang R, et al. Unified solution method of rectangular plate elastic bending [J]. Journal of Southeast University: English Edition, 2002, 18(3): 241-248.
[10]戴杰涛.薄宽带钢板形翘曲与纵向瓢曲变形行为研究[D]. 北京:北京科技大学,2010.
Dai J T. Research on Warping and Longitudinal Deformation of Thin Broadband Steel Plate [D]. Beijing: University of Science and Technology Beijing, 2010.
[11]张清东,戴杰涛.带钢板形翘曲变形行为的仿真[J].北京科技大学学报, 2011, 33(8): 1006-1012.
Zhang Q D, Dai J T. Simulation of warping deformation in thin steel strips[J]. Journal of University of Science and Technology Beijing, 2011, 33(8): 1006-1012.
[12]张清东,卢兴福,戴杰涛,等.冷轧带钢板形翘曲变形过程及规律的解析[J].北京科技大学学报, 2014, 36(3): 378-382.
Zhang Q D, Lu X F, Dai J T, et al. Analysis of warping deformation for cold-rolled strips[J]. Journal of University of Science and Technology Beijing, 2014, 36(3): 378-382.
[13]何建峰.宝钢镀锡板翘曲原因分析与对策[J].宝钢技术, 2004, (1): 36-39.
He J F. Cause analysis of tinplate warp and our countermeasures[J]. Baosteel Technology, 2004, (1): 36-39.
[14]岳学虎.母线立弯成形中翘曲变形及其影响研究[D]. 昆明: 昆明理工大学,2019.
Yue X H. Research on Warpage Deformation and Its Influence in Vertical Bending of Busbar [D]. Kunming: Kunming University of Science and Technology, 2019.
[15]李开禧,王永华,白洪源.翘曲理论的计算机验证[J]. 重庆建筑大学学报,2002, 24(5):46-51,57.
Li K X, Wang Y H, Bai H Y. Review and Verification of Warping Theory by Computer [J]. Journal of Chongqing Jianzhu University, 2002, 24(5): 46-51,57.
[16]刘湘云,邵全统.冷冲压工艺与模具设计[M]. 北京:航空工业出版社,1994.
Liu X Y, Shao Q T. Cold Stamping Process and Die Design [M]. Beijing: Aviation Industry Press, 1994.
[17]秦泗吉,闫艳红.宽板弯曲问题的应力中性层与应变中性层[J]. 燕山大学学报,2002, 26(3): 213-215.
Qin S J, Yan Y H. The neutral surfaces of stress and strain in wide plate bending process[J]. Journal of Yanshan University, 2002, 26(3): 213-215.
[18]梁炳文,胡世光.弹塑性稳定理论[M]. 北京:国防工业出版社,1983.
Liang B W, Hu S G. Elastoplastic Stability Theory[M]. Beijing: National Defense Industry Press, 1983.
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