| 闭孔泡沫铝应变率效应的试验和有限元分析 |
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| 引用本文： | 张健,赵桂平,卢天健.闭孔泡沫铝应变率效应的试验和有限元分析[J].西安交通大学学报,2010,44(5). |
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| 作者姓名： | 张健 赵桂平 卢天健 |
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| 作者单位： | 西安交通大学航天航空学院,710049,西安;西安交通大学强度与振动教育部重点实验室,710049,西安 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
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| 摘 要： | 通过对具有不同孔隙率的闭孔泡沫铝在不同应变率下的动态压缩试验和数值模拟,研究了泡沫铝的应变率敏感性.结果表明:在准静态(0.001s-1)至2500s-1的应变率范围内,具有相同孔隙率的泡沫铝的静、动态单轴压缩变形模式相似,而具有不同孔隙率的泡沫铝的压缩变形模式则存在差异,高孔隙率和低孔隙率泡沫铝的应变率敏感性明显不同;基体材料的应变率敏感性决定了泡沫铝的应变率敏感性;微惯性、波效应和孔内气体压力对泡沫铝的平台应力不产生明显影响.
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| 关 键 词： | 闭孔泡沫铝 霍普金森压杆 应变率效应 |
Experimental and Numerical Study on Strain Rate Effects of Close-Celled Aluminum Foams |
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| ZHANG Jian,ZHAO Gunping,LU Tianjian.Experimental and Numerical Study on Strain Rate Effects of Close-Celled Aluminum Foams[J].Journal of Xi'an Jiaotong University,2010,44(5). |
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| Authors: | ZHANG Jian ZHAO Gunping LU Tianjian |
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| Institution: | ZHANG Jian1,2,ZHAO Guiping1,LU Tianjian1,2(1.School of Aerospace,Xi\'an Jiaotong University,Xi\'an 710049,China,2.MOE Key Laboratory forStrength , Vibration,China) |
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| Abstract: | The strain rate effects of close-celled aluminum foams with different porosities were experimentally and numerically investigated at different strain rates.It is found that the dynamic deformation behavior of aluminum foams with same porosity is similar to their quasi-static behavior in the strain rate ranging from 0.001 s-1 to 2 500 s-1.The strain rate effects of aluminum foams with varying porosities are significantly different due to different deformation modes.The strain rate sensitivity of aluminum foa... |
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| Keywords: | close-celled aluminum foam split Hopkinson pressure bar strain rate effect |
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