| 闭孔泡沫铝特征统计及其变形行为实验研究 |
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| 引用本文： | 杨福俊,唐兆琛,朱莉,何思渊,何德坪,何小元.闭孔泡沫铝特征统计及其变形行为实验研究[J].东南大学学报(自然科学版),2009,39(2). |
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| 作者姓名： | 杨福俊 唐兆琛 朱莉 何思渊 何德坪 何小元 |
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| 作者单位： | 1. 东南大学土木工程学院,南京,210096
2. 东南大学材料科学与工程学院,南京,210096 |
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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： | 以椭圆拟合长方体闭孔多边形泡沫铝表面孔截面,运用统计学的方法研究了泡沫铝试件表面孔的大小、形状和方位等分布特征.统计结果表明:上述孔的各项几何特征参数除方位外服从高斯分布. 应用图像处理技术,获取了单轴压缩变形前后泡沫铝试件的表面图像.利用序列数字图像相关方法对泡沫纯铝变形前后的图像进行相关计算,获得了静态单向压缩条件下闭孔泡沫铝材料表面全场变形及局部孔结构的变形,同时根据试验结果计算了试件的名义应力-应变曲线,给出了压缩过程中孔壁的失效顺序和破坏规律.对块体材料的压缩实验表明,泡沫纯铝是以多个断裂带的形式破坏和吸收能量.
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| 关 键 词： | 闭孔泡沫铝 孔结构特征统计 单轴压缩 孔结构变形 图像相关方法 |
Experimental study on cellular structure statistical analysis and uniaxial deformation behavior of closed-cell aluminum foam |
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| Yang Fujun,Tang Zhaochen,Zhu Li,He Siyuan,He Deping,He Xiaoyuan.Experimental study on cellular structure statistical analysis and uniaxial deformation behavior of closed-cell aluminum foam[J].Journal of Southeast University(Natural Science Edition),2009,39(2). |
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| Authors: | Yang Fujun Tang Zhaochen Zhu Li He Siyuan He Deping He Xiaoyuan |
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| Institution: | 1School of Civil Engineering;Southeast University;Nanjing 210096;China;2School of Materials Science and Engineering;China |
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| Abstract: | Statistic analysis on the tested Al foam,including cellular size,shape and relative orientation,is performed based on the best-fit ellipse equivalent diameter for the individual cells.It shows that the statistical distribution of cells' size and shape follow Gauss distribution at significance level of 0.05.Based on calculating correlation of the images captured before and after deformation,digital image correlation method(DICM) is employed to measure the deformation of the closed-cell aluminum foam under un... |
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