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。
A gear of an aerial system broke during the unfolding test. A series of test results show that the metal- lurgical structure, the chemical composition, and the mechanical properties of the material all meet the demands of re- lated 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.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2015年第1期82-85,共4页
Aerospace Materials & Technology
关键词
铰链接头
微观形貌
疲劳条带
疲劳断裂
失效分析
Link connection, Micro appearance, Fatigue strips, Fatigue fracture, Failure analysis