| DP780高强钢板动态变形力学行为研究 |
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| 引用本文： | 田成达,李大永,彭颖红,汪晨. DP780高强钢板动态变形力学行为研究[J]. 塑性工程学报, 2008, 15(6) |
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| 作者姓名： | 田成达 李大永 彭颖红 汪晨 |
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| 作者单位： | 1. 上海交通大学,机械与动力工程学院,上海,200240
2. 宝山钢铁股份有限公司,上海,200122 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，上海市科教兴市项目，上海市优秀学科带头人计划项目，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 通过准静态拉伸实验和0.1m/s,2m/s,10m/s和15m/s等4种拉伸速度下的动态冲击拉伸实验,对DP780高强钢板的动态变形行为进行了研究,得到了不同应变率下的应力-应变曲线,基于Johnson-Cook模型建立了可描述DP780高强钢变形应变率相关性的应力-应变关系模型。为更好地预测材料动态冲击条件下的应变率以及应力的变化,提出了一个基于宏观变量速度v的本构关系方程,数值拟合结果与实验结果十分吻合。
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| 关 键 词： | DP780 冲击拉伸 应变率 J-C本构 |
Research on the dynamic deformation behavior of the DP780 advanced high strength steel |
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| TIAN Cheng-da,LI Da-yong,PENG Ying-hong,WANG Chen. Research on the dynamic deformation behavior of the DP780 advanced high strength steel[J]. Journal of Plasticity Engineering, 2008, 15(6) |
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| Authors: | TIAN Cheng-da LI Da-yong PENG Ying-hong WANG Chen |
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| Abstract: | The dynamic deformation behavior of the DP780 was studied by the quasistatic tensile experiment and the dynamic tensile experiment under the speed of the 0.1m/s,2m/s,10m/s and 15m/s.The strain-stress curves were obtained under the different strain rates and the mechanical behavior of DP780 constitutive equation was established based on the Johnson-Cook model.A new constitutive equation based on the variable-tensile speed v was developed to better forecast the strain rate and stress under the dynamic impact condition.The result turns out:the new constitutive is accordance with the experimental data. |
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| Keywords: | DP780 |
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