代鹏,高晗菲,樊晓光.纯钼薄板温热条件下的各向异性及本构建模研究[J].精密成形工程,2020,12(2):1-7.
DAI Peng,GAO Han-fei,FAN Xiao-guang.Anisotropy and Constitutive Modeling of Thin Pure Molybdenum Sheet at Room to Medium Temperature[J].Journal of Netshape Forming Engineering,2020,12(2):1-7. |
| 纯钼薄板温热条件下的各向异性及本构建模研究 |
| Anisotropy and Constitutive Modeling of Thin Pure Molybdenum Sheet at Room to Medium Temperature |
| 投稿时间：2019-11-26 修订日期：2020-03-10 |
| DOI：10.3969/j.issn.1674-6457.2020.02.001 |
| 中文关键词: 纯钼板 各向异性 屈服准则 温度和应变相关性 |
| 英文关键词: molybdenum sheet anisotropy yield criterion temperature and strain correlation |
| 基金项目:真空技术与物理重点实验室开放基金（Y07-005） |
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| 中文摘要: |
| 目的 研究交叉轧制纯钼薄板温热条件下的各向异性和本构关系。方法 对纯钼薄板进行不同温度及方向下的拉伸实验，根据各向异性的特征并基于Hu2003屈服准则，以修正的Johnson-Cook模型对屈服准则的参数进行识别，建立考虑温度和应变的屈服准则。结果 退火后的纯钼薄板具有一定的面内各向异性和显著的厚向异性，面内各向异性随温度升高而减弱，厚向异性对温度不敏感；加入温度变量的Hu2003屈服准则对不同温度下的屈服面描述较为准确，室温及100 ℃时屈服面减小速率较大，温度高于300 ℃时，屈服面减小速率减小并趋于稳定，屈服面形状并未发生明显扭曲变形；屈服面随应变增加未出现较为明显的扭曲强化现象。结论 对钼板各向异性和本构关系的研究可用于指导钼板件冲压成形。 |
| 英文摘要: |
| The work aims to study the plastic anisotropy and constitutive relation of the cross-rolled pure molybdenum sheet at room to medium temperature. Tensile tests were carried out to the pure molybdenum sheet at different temperature and loading directions. Based on the anisotropy and Hu2003 yield criterion, a yield criterion considering the effect of temperature and strain was developed by identifying the parameters with modified Johnson-Cook model. It was found that the pure molybdenum sheet had moderate in-plane anisotropy and sound normal anisotropy. The in-plane anisotropy decreased with the increasing temperature, while the normal anisotropy was not sensitive to temperature. Hu2003 yield criterion with temperature variable was more accurate to describe the yield surface at different temperature. The reduction rate of yield surface was larger at room temperature and 100 ℃. When the temperature was higher than 300 ℃, the reduction rate of yield surface decreased and tended to be stable, and the shape of yield surface did not undergo obvious distortion. The yield surface did not show obvious distortion strengthening phenomenon with the increase of strain. The research on anisotropy and constitutive relation of molybdenum sheet can guide the stamping of molybdenum components. |
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