| SiCp/A356复合材料的细观损伤及混联失效模型 |
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| 引用本文： | 杨智勇,韩建民,李卫京,王金华.SiCp/A356复合材料的细观损伤及混联失效模型[J].航空材料学报,2008,28(2):65-69,90. |
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| 作者姓名： | 杨智勇 韩建民 李卫京 王金华 |
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| 作者单位： | 北京交通大学,机械电子与控制工程学院,北京,100044 |
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| 摘 要： | 采用SiC颗粒增强铝基复合材料制动盘本体取样,对SiC颗粒增强铝基复合材料在室温和高温条件下的细观损伤断裂机制进行研究。在试样断口上,通过扫描电镜观察到裂纹的萌生和扩展,SiC颗粒和裂纹扩展面的改变对裂纹生长的阻滞作用和以SiC颗粒为中心的辐射状疲劳条纹。提出一种颗粒增强复合材料的细观损伤混联模型,用于解释材料细观裂纹的萌生和扩展。
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| 关 键 词： | 细观损伤 颗粒增强金属基复合材料 断裂 混联模型 |
| 文章编号： | 1005-5053(2008)02-0065-06 |
| 修稿时间： | 2007年5月23日 |
Research on Meso-Scale Damage Fracture and Series-to-Parallel Failure Model for SiCp/A356 Composites |
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| YANG Zhi-yong,HAN Jian-min,LI Wei-jing,WANG Jin-hua.Research on Meso-Scale Damage Fracture and Series-to-Parallel Failure Model for SiCp/A356 Composites[J].Journal of Aeronautical Materials,2008,28(2):65-69,90. |
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| Authors: | YANG Zhi-yong HAN Jian-min LI Wei-jing WANG Jin-hua |
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| Abstract: | The meso-scale damage fracture mechanism of silicon carbide(SiC) particulate reinforced aluminum matrix composite specimens from the SiCp/A356 brake disk products was investigated on the room and high temperature.Fatigue crack initiation and propa-gation behaviors were examined by using an S-250MK3 scanning electron microscope on the fractured surfaces.It was also found that the crack growth rate was decreased due to the hindering effect of the particles or the change of the growth plane of the cracks,and the striations radiating from SiC particulates could be shown.A series-to-parallel model of micro-damage was proposed in order to explain the initiation and propagation of cracks.It is concluded that the damage evolution could be expressed in a series-to-parallel model of micro-damage. |
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| Keywords: | meso-scale damage particulate reinforced metal matrix composites fracture series-to-parallel model |
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