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| 铰链接头齿轮断裂失效分析 | |
| 引用本文： | 孙,璐.铰链接头齿轮断裂失效分析[J].宇航材料工艺,2015,45(1). |
| 作者姓名： | 孙 璐 |
| 作者单位： | 北京卫星制造厂 |
| 摘 要： | 某天线系统同步铰链接头在进行展开试验时发生接头齿轮断裂。试验结果表明,其原材料的金相组织、化学成分和力学性能均满足标准要求,通过扫描电镜对断齿断口进行微观形貌观察发现,其中一断齿的裂纹源区有明显的疲劳条带,其他断齿均为塑性过载断裂形貌,结合天线系统试验过程,判断其失效机理为个别轮齿疲劳开裂引起其他齿塑性过载断裂,最终导致整体铰链接头的失效。 |
| 关 键 词： | 铰链接头 微观形貌 疲劳条带 疲劳断裂 失效分析 |
Fracture Failure Analysis for the Gear of Link Connection |
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| Institution: | Beijing Spacecrafts |
| Abstract: | A gear of an aerial system broke during the unfolding test. A series of test results show that the metallurgical structure, the chemical composition, and the mechanical properties of the material all meet the demands of related standards. Via scanning electron microscope, the micro appearance of the fracture has been observed. Evident fatigue strips were found in the crack characters. Combined with test process of the aerial system, it is concluded that the failure mechanism is that the fatigue broken of individual teeth caused the plastic overload fracture of other teeth and finally lead to the failure of the whole link connection. |
| Keywords: | Link connection Micro appearance Fatigue strips Fatigue fracture Failure analysis |
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