| 张晓阳,谭仕锋,刘泽宇,赵飘.中高应变率下泡沫金属动态拉伸有限元模型研究[J].南华大学学报(自然科学版),2022,(6):45~50.[ZHANG Xiaoyang,TAN Shifeng,LIU Zeyu,ZHAO Piao.Study on Finite Element Model of Metallic Foams under Dynamic Tension[J].Journal of University of South China(Science and Technology),2022,(6):45~50.] |
| 中高应变率下泡沫金属动态拉伸有限元模型研究 |
| Study on Finite Element Model of Metallic Foams under Dynamic Tension |
| 投稿时间：2022-07-03 |
| DOI： |
| 中文关键词: 泡沫金属 动态拉伸 边缘加厚方法 加载路径 中高应变率 |
| 英文关键词:metallic foam dynamic tension cell thickness thicken method loading path medium to high-strain rate |
| 基金项目:国家自然科学基金项目(11902140);湖南省自然科学基金项目(2018JJ3425);湖南省教育厅科学基金项目(18C0449) |
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| 中文摘要: |
| 泡沫金属单轴动态拉伸加载时往往会发生边缘局部破坏的现象,导致有限元模型结果不能准确地反映动态拉伸力学性能,本文基于三维(three dimensional,3D)Voronoi立方体模型开展了泡沫金属单轴动态拉伸数值仿真实验,采用改变加载路径与边缘胞壁加厚倍数两种方法,有效地避免了高应变率动态拉伸条件下泡沫金属边缘破坏的现象发生,提出了适用于高应变率下泡沫金属动态拉伸力学性能测试的方法。 |
| 英文摘要: |
| The phenomenon of local damage of the edge often occurs when the foam metal is loaded under uniaxial dynamic tension, so that the results of the finite element model can not accurately reflect the dynamic tensile mechanical properties. Based on the three-dimensional (three dimensional, 3D) Voronoi cube model, the numerical simulation experiment of uniaxial dynamic tension of metal foam is carried out, using two methods of changing the loading path and the edge cell wall thickening multiple. The phenomenon of edge failure of metal foam under high strain rate dynamic tension is effectively avoided, and a method suitable for testing the dynamic tensile mechanical properties of metal foam at high strain rate is proposed. |
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