锻压技术

奥迪汽车B柱超高强钢热冲压厚度分布研究

英文标题：Study on thickness distribution after hot stamping with ultra high strength steel in Audi car B column

作者：单云

单位：无锡职业技术学院

关键词：超高强钢热冲压有限元分析

分类号：O644

出版年,卷(期):页码：2015,40(2):22-25

摘要：

根据numisheet 2008标准考题benchmark problem BM3模块上提出的汽车B柱热冲压成形问题，对汽车B柱热冲压进行了建模，并进行热冲压分析。对B柱上3个典型截面P1，P2，P3进行了有限元分析，主要研究了3个截面的厚度分布情况，并将3个典型截面的厚度值与试验结果进行比较。研究表明：B柱热成形后厚度分布基本保持均匀分布，尾部局部区域发生突变增厚现象，P1截面的厚度值对称分布，中间部位出现厚度峰值；P2截面厚度值沿截面线呈先减小后增大的对称分布；P3截面厚度沿Section 3a的方向变化较大，Section 3b变化平缓，有限元结果和实验结果基本相吻合。

Based on the issue of hot stamping for car B column from benchmark problem BM3 module of the numisheet 2008 standard examination questions, the model of hot stamping Audi car B column was established, and the process of the hot stamping was analyzed. Three typical sections on B column (P1, P2, P3) were simulated by the finite element software, the thickness distribution of the three sections was mainly studied, and finally the results were compared with experiments. It is shown that the thickness distribution of B pillar maintains almost uniform after hot stamping, except the phenomenon of thickening mutation in the local place of the tail. The thickness on section P1 is in symmetric distribution with the peak in the middle; on P2 section, the thickness is also in symmetrical distribution but along the cross section line increases first and then decreases; the bigger thickness changing is along the direction of 3a on P3 section, and the changing along that of 3b on P3 section is gently. In short, all the results in simulation have a good consistent with the experiments.

基金项目：

国家自然科学基金资助项目（5075102）

单云（1971-），女，硕士，副教授

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