| 坦克履带板疲劳裂纹分形维数随裂纹扩展的变化规律 |
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| 引用本文： | 徐莲云,田欣利,侯振德. 坦克履带板疲劳裂纹分形维数随裂纹扩展的变化规律[J]. 兵工学报, 2005, 26(3): 383-386 |
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| 作者姓名： | 徐莲云 田欣利 侯振德 |
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| 作者单位： | 天津大学,力学系,天津,300072;装甲兵工程学院,北京,100072 |
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| 摘 要： | ZGMn13是主战坦克履带板材料，研究其断裂性能对提高坦克的战技水平意义重大。本文用扫描电镜( SEM)对有疲劳裂纹试件按确定位置进行拍照，经编程处理后得到裂纹轮廓线，采用垂直剖面法测量其分形维数，通过研究分形维数随裂纹扩展的变化规律，最终确定在每个试件疲劳裂纹的中间位置其分形维数最大。
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| 关 键 词： | 金属材料 疲劳断裂 裂纹轮廓线 垂直剖面法 分形维数 |
| 文章编号： | 1000-1093(2005)03-0383-04 |
Fractal Dimensions of Fracture Cracks on Tank Track Materials and Their Variation with Crack Extension |
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| XU Lian-yun,TIAN Xin-li,HOU Zhen-de. Fractal Dimensions of Fracture Cracks on Tank Track Materials and Their Variation with Crack Extension[J]. Acta Armamentarii, 2005, 26(3): 383-386 |
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| Authors: | XU Lian-yun TIAN Xin-li HOU Zhen-de |
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| Affiliation: | 1. Department of Mechanics Tianjin University, Tianjin 300072, China;2. Academy of Armored Forces Engineering College, Beijing 100072, China |
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| Abstract: | ZGMn13 is a kind of material extensively used in tank tracks, so an investigation of its fracture property is of significance for improving tank performance. Digital images on specific positions of fatigue crack in specimens are taken by scanning electron microscope (SEM). Crack profiles are obtained by an image processing technique. The fractal dimensions of each crack profile are measured by fracture profile method(FPM). It is found that the fractal dimensions vary with crack extension, and the maximum fractal dimension is in the middle area of each fatigue crack. |
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| Keywords: | metal material fatigue fracture crack profile fracture profile method fractal dimension |
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