锻压技术

基于帽形冲击实验的Q & P钢冲击性能研究

英文标题：Study on impact property of Q & P steel based on capshaped impact test

作者：叶又邓璐璐连昌伟刘树文

分类号：TG142

出版年,卷(期):页码：2018,43(6):172-179

摘要：

冲击及吸能性能是高强钢在汽车安全中的重要特性，基于帽形冲击实验及仿真，对QP980、DP980和DP780钢的吸能特性及其规律性展开对比分析及研究。进行了厚度为1.6 mm的3种板料帽形试样碰撞实验，对碰撞实验进行了有限元仿真，通过比较相同冲击速度下实验与仿真中压溃力-时间曲线、最大压溃距离及变形模式，验证了仿真模型的准确性，并基于仿真模型，预测了不同初始碰撞能量情况下试样的变形模式及变形行为。通过实验及有限元仿真，分析比较了QP980、DP980、DP780的吸能特性及其规律性，结果发现QP980的冲击碰撞性能较好，且相同碰撞能量下，DP980与QP980的帽形件变形模式基本相同。

Impact and energy absorption properties are important features of high strength steel in the automotive safety. Based on capshaped impact test and finite element analysis, the energy absorption characteristics and regularity of QP980, DP980 and DP780 were compared and analyzed, and three kinds of plate capshaped specimens with thickness of 1.6 mm were conducted by the impact test. Then, the above impact tests were simulated by finite element method, and the accuracy of the simulation model was verified by comparing curves of crushing force versus time, maximum crushing distance and deformation modes in finite element simulation and experiment under the same impact velocity. Furthermore, the deformation mode and deformation behavior of the specimens under different initial impact energies were predicted based on the simulation model. Finally, the energy absorption characteristics and regularity of QP980, DP980 and DP780 were compared and analyzed by experiments and finite element simulation. The results show that the impact properties of QP980 are better, and the deformation modes of capshaped parts DP980 and QP980 are basically the same under the same impact energy.

基金项目：

叶又（1968-），男，博士，高级工程师；Email：you_ye@patac.com.cn

参考文献：

［1］Zhu S, Kang Y, Shengci L I, et al. Effect of partitioning temperature on microstructure and mechanical properties of Q&P steel
［J］. Hot Working Technology, 2011, 40(24), 176-178.

［2］庄宝潼, 唐荻, 江海涛,等. 汽车用高强度Q&P钢的组织与力学性能
［J］. 工程科学学报, 2012, 34(4):390-396.

Zhuang B T, Tang D, Jiang H T, et al.Microstructure and mechanical properties of high strength Q&P steel for automobile
［J］.Journal of Engineering Science, 2012, 34(4):390-396.

［3］Moor E D, Lacroix S, Clarke A J, et al. Effect of retained austenite stabilized via, quench and partitioning on the strain hardening of martensitic steels
［J］. Metallurgical and Materials Transactions A, 2008, 39(11):2586-2595.

［4］徐祖耀. 钢热处理的新工艺
［J］. 热处理, 2007, 22(1):1-11.

Xu Z Y. A new process for heat treatment of steel
［J］.Heat Treatment, 2007, 22(1):1-11.

［5］徐祖耀. 淬火-碳分配-回火(QPT)工艺浅介
［J］. 金属热处理, 2009, 34(6):1-8.

Xu Z Y. Quenchingcarbon distributiontempering (QPT) process
［J］.Heat Treatment of Metals,2009, 34(6):1-8.

［6］李卫红, 赵磊, 李卫钊,等. Q&P钢在汽车上应用性能的研究
［J］. 热加工工艺, 2015, (16):68-70.

Li W H, Z L, L W Z, et al. Study on application performance of Q&P steel on automobile
［J］. Hot Working Technology, 2015, (16):68-70.

［7］余同希，卢国兴，华云龙. 材料与结构的能量吸收 : 耐撞性·包装·安全防护
［M］. 北京：化学工业出版社, 2006.

Yu T X, Lu G X, Hua Y L. Energy Absorption of Materials and Structures: Crashworthinesspackagingsafety Protection
［M］. Beijing: Chemical Industry Press, 2006.

［8］王特捷, 付应乾, 俞鑫炉,等. 帽型梁落锤轴向冲击实验及有限元分析
［J］. 现代应用物理, 2014,(1):59-63.

Wang T J, Fu Y Q, Yu X L, et al. Drop hammer axial impact test and finite element analysis of cap shaped beam
［J］. Modern Applied Physics,2014,(1):59-63.

［9］Rossi A, Fawaz Z, Behdinan K. Numerical simulation of the axial collapse of thinwalled polygonal section tubes
［J］. ThinWalled Structures, 2005, 43(10):1646-1661.

［10］Fyllingen , Hopperstad O S, Langseth M. Robustness study on the behaviour of tophat thinwalled highstrength steel sections subjected to axial crushing
［J］. International Journal of Impact Engineering, 2009, 36(1):12-24.

［11］陈贵江, 康永林, 朱国明,等. 高强度双相钢DP800成形件碰撞性能仿真分析
［J］. 塑性工程学报, 2010, 17(4):91-95.

Chen G J, Kang Y L, Zhu G M, et al. Simulation and analysis of crashworthiness of high strength dual phase steel DP800 forming parts
［J］. Journal of Plasticity Engineering, 2010, 17(4):91-95.

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