|
摘要：
|
|
基于BT壳单元和有限元增量理论开发了板料对向液压成形模拟算法,对液体压强所施加的区域进行判定,并对该区域液压力进行计算。将算法集成到自主开发的冲压成形模拟软件FASTAMP中,适用于复杂汽车覆盖件的对向液压成形。以实际生产的汽车覆盖件卡车顶盖为例,采用实际液压加载曲线进行成形分析。针对成形中的折叠和破裂缺陷,对该加载曲线进行优化,工件的成形质量得到提高。模拟结果与实验结果基本相符验证了对向液压成形模拟算法的准确性和实用性。
|
|
An algorithm for the sheet hydro-forming was developed,which was based on BT shell element and dynamic explicit method,the areas on which liquid pressures act were judged,and the liquid forces was computed. The algorithm was integrated into self-developed software FASTAMP which was used to the numerical simulation of drawing process,and was applied in the automobile panel hydro-forming. The simulation of a practical automobile body metal sheet,namely a truck top cover part,was done with a practical load path. According to fold and burst defect in hydro-forming,the practical load path was optimized,the performance of the part was improved. The precision and the practicability of the algorithm for hydro-forming were validated by the agreement between the simulation results and the experimental results.
|
|
基金项目：
|
|
国家科技支撑资助项目(2006BAF01A43);;
中国博士后科学基金资助项目(20080440930)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]吴有生,夏巨谌,胡国安.板料液压成形技术的发展动态及应用[J].金属成形工艺,2002,20(4):1-3.
[2]朗利辉,Danckert J,Nielsen K B,等.板液压成形及无模充液拉深技术[J].塑性工程学报,2002,9(4):29-34.
[3]李涛,郎利辉,周贤宾.先进板材液压成形技术及其进展[J].塑性工程学报,2006,13(3):30-34.
[4]梁晨,程嘉,王连东,等.汽车桥壳液压胀形的数值模拟及其实验研究[J].锻压技术,2009,34(1):157-160.
[5]唐琼,郑再象.润滑条件对管件液压成形结果的影响[J].锻压技术,2008,33(4):60-62,66.
[6]Ki mJ,Kang S J,Kang B S.Computational approach to anal ysis and design of hydroforming process for an automobilelower arm[J].Computers&structures,2002,80(14-15):1295-1304.
[7]Hama T,Asakawa M,Makinouchi A.Investigation of factors which cause breakage during the hydroforming of an automo-tive part[J].Journal of Materials Processing Technology,2004,150(1-2):10-17.
[8]Hama T,Hatakeyama T,Asakawa M,et al.Finite-element si mulation of the elliptical cup deep drawing process by sheet hydroforming FEM[J].Finite Elementsin Analysis and De-sign,2007,43(3):234-246.
[9]柳玉起,杜亭,章志兵.板料冲压成形快速分析软件FAS-TAMP[J].材料科学与工艺,2004,12(4):353-356.
[10]Belytschko T,Lin J I,Tsay C S.Explicit algorithms for non-linear dynamics of shells[J].Computer Methods in Applied Mechanics and Engineering,1984,42(2):225-251.
[11]Papadrakakis M.A method for the automated evaluation for the dynamic relaxation parameters[J].Computer Methods in Ap-plied Mechanics and Engineering,1981,25(1):35-48.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
