锻压技术

变径管自由翻转变形的趋向性研究

英文标题：Trends study of deformation for free inversion of variable-diameter tube

作者：邓天根雷君相

单位：上海理工大学

分类号：TH14

出版年,卷(期):页码：2014,39(2):144-149

摘要：

利用液压胀形与折叠工艺将圆管成形为变径管，成形后变径管的中管存在圆锥台、倒圆锥台、圆柱壳3种类型。不同类型的中管受到轴向压缩后的变形模式不同，随着加载位移的不断增大，所产生的自由翻转力大小和平稳程度也不相同。通过比较外管内翻和内管外翻的难易程度，研究不同变径管下的变形模式，对3种类型的变径管在轴向位移作用下的翻转力和中管的平稳程度进行了数值模拟和实验研究。数值模拟结果与实验结果一致，中管为圆柱壳的变径管在自由翻转时变形模式最理想。

In the process of forming from tube to variable-diameter tube by hydraulic bulging and folding, there are three kinds of variable-diameter tubes, including truncated cone, inverted truncated cone and cylindrical shell. Different variable-diameter tubes have different modes of deformation by axial compression. With the increase of loading displacement, free inversion force and the degree of smoothing are not the same. Comparing the difficult degree of outer tube rolled to inner tube with inner tube rolled to outer tube, and studying modes of deformation for different variable-diameter tubes, numerical simulation and experimental study were conducted to study the free inversion force and the degree of smoothing for different variable-diameter tubes under the axial displacement. Numerical simulation and experimental study matched well, and it is concluded that variable-diameter tube which has cylindrical shell is the best.

基金项目：

上海市自然科学基金资助项目(06ZR14143)

邓天根（1987-），男，硕士研究生

参考文献：

［1］李文杰,丁玉兰.汽车碰撞事故中乘员人体动力学分析[J]. 中国工程机械学报，2007,5(3):277-281.Li Wenjie, Ding Yulan. Dynamics analysis on motorists during vehicle collision accidents [J]. Chinese Journal of Construction Machinery, 2007，5(3):277-281.
［2］Salehghaffari S, Rais-Rohanin M, Najafi A. Analysis and optimization of externally stiffened crush tubes[J].Thin-Walled Structures，2011，49:397-408.
［3］殷之平,李玉龙,黄其青.薄壁圆筒结构耐撞性优化设计[J]. 机械科学与技术,2010,29(2):220-224.Yin Zhiping, Li Yulong, Huang Qiqing. Crashworthiness optimization of cylindrical thin-walled columns[J]. Mechanical Science and Technology for Aerospace Engineering，2010，29(2):220-224.
［4］Zhang X, Hoon Huh. Energy absorption of longitudinally grooved square tubes under axial compression[J]. Thin-Walled Structures，2009，47:1469-1477.
［5］余同希. 结构的耐撞性和能量吸收装置[J]. 力学与实践, 1985, 7(3):2-9.Yu Tongxi. Structural crashworthiness and energy absorption device[J].Mechanics in Engineering, 1985, 7(3):2-9.
［6］Zhang X, Cheng G D, Hui Z. Numerical investigations on a new type of energy-absorbing structure based on free inversion of tubes[J]. International Journal of Mechanical Sciences, 2009, 51(2):761-768.
［7］汪奇超,雷君相,骆协海.铝合金防碰撞吸能管液压成形加载路径研究[J].锻压技术,2011 ,36(6):55-58.Wang Qichao, Lei Junxiang, Luo Xiehai. Research on hydraulic forming loading paths of aluminium alloy anti-collision energy-absorbing tube[J].Forging & Stamping Technology, 2011 ,36(6):55-58.
［8］余同希,卢国兴. 材料与结构的能量吸收[M]. 北京: 化学工业出版社,2006．Yu Tongxi, Lu Guoxing. Energy Absorption of Structures and Materials[M]. Beijing: Chemical Industry Press, 2006.
［9］雷君相,李笠. 圆管缩径能量吸收装置的研究[J]. 塑性工程学报,1995,2(2):57-64.Lei Junxiang, Li Li. A study of energy absorbing device for Necking tube[J]. Journal of Plasticity Engineering,1995,2(2):57-64.
［10］孙志超,杨合.管轴压成形失稳起皱力学过程的研究[J].机械工程学报,2003,39(6):110-113.Sun Zhichao, Yang He. Research on mechanical model of buckling in tube axial compressive forming process[J].Chinese Journal of Mechanical Engineering,2003,39(6):110-113.
［11］王敏杰. 变径管液压胀形与折叠和自由翻转变形的研究[D]. 上海: 上海理工大学,2012.Wang Minjie. A Study of Hydraulic Bulging and Folding and Free Inversion for Variable-diameter Tube [D].Shanghai:University of Shanghai for Science & Technology,2012.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】