陈明,刘渊媛,余立.780 MPa级CSP短流程双相钢动态性能本构模型[J].精密成形工程,2017,9(6):20-26.
CHEN Ming,LIU Yuan-yuan,YU Li.Constitutive Model for Dynamic Property of 780 MPa CSP Short Process Dual Phase Steel[J].Journal of Netshape Forming Engineering,2017,9(6):20-26. |
| 780 MPa级CSP短流程双相钢动态性能本构模型 |
| Constitutive Model for Dynamic Property of 780 MPa CSP Short Process Dual Phase Steel |
| 投稿时间：2017-09-20 修订日期：2017-11-10 |
| DOI：10.3969/j.issn.1674-6457.2017.06.005 |
| 中文关键词: 双相钢 动态 应变率 本构模型 |
| 英文关键词: dual phase steel dynamic strain rate constitutive model |
| 基金项目: |
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| 中文摘要: |
| 目的 研究780 MPa级的短流程双相钢动态本构关系，建立能够准确描述材料的应变率敏感特性的本构模型。方法 利用Zwick动态拉伸试验机和高速摄像应变测量系统，对该材料进行不同应变速率的拉伸试验，速率分别为0.001, 0.01, 0.1, 1, 10, 100, 500 s−1。结果 该材料具有明显的应变率效应，即强度随着应变率的升高而增加。基于Johnson-Cook、Zerilli-Armstrong和Khan-Huang模型对试验结果进行拟合，拟合优度分别为0.9736, 0.9765, 0.8926，对Khan-Huang模型进行修正后的拟合优度为0.9827。结论 JC和ZA模型可以直接准确表征材料本构关系，而KH模型需要修正后才能准确描述材料在高应变率下的本构关系。 |
| 英文摘要: |
| In order to study the dynamic constitutive relationship of CSP DP780, establish a constitutive model to accurately describe the strain rate sensitivity of material, the Zwick dynamic tensile tester and high speed camera strain measurement system were used to do tensile test at different strain rates , 0.001, 0.01, 0.1, 1, 10, 100, 500 s−1. The material had sensitivity of strain rate, that is, the strength increased with the strain rate. According to fit of test results based on Johnson-Cook, Zerilli-Armstrong and Khan-Huang models, the goodness of fit were 0.9736, 0.9765 and 0.8926 respectively, and the goodness of fit of the modified Khan-Huang model was 0.9827. JC and ZA models can describe the constitutive relation of the material accurately, while the KH model needs to be modified to describe the constitutive relation of the material at high strain rate accurately. |
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