燕尾榫联接结构微动疲劳裂纹的检测技术

自行研制了燕尾榫联接结构微动疲劳裂纹检测系统,利用应变片感知将要产生疲劳裂纹处周围的应变变化,把该应变信号经过A/D转换后送到PC机进行实时分析。该系统能比较准确捕获到疲劳裂纹出现的时间,有效地观测到疲劳裂纹的萌生和扩展过程。微动疲劳试验结果表明该方法简单实用、检测准确、效果明显,解决了疲劳裂纹观测难、捕获裂纹时刻延迟、工作强度大等问题。 

Fretting Fatigue Crack Detection Technique for Dovetail Attachment

The fretting fatigue crack detection system was developed.In the system,the areas where the fretting fatigue cracks would happen were predicted at first,the strain gauges were used to collect the strain signals around those areas.The signals were transmitted to the computer after A/D converters.Then the data could be analyzed to acquire the accurate time of the initiation of fretting fatigue crack,and observe the crack's expanding process.The result of fretting fatigue experiment shows that the fretting fatigue crack detection system is easy to use and accurate to find out fatiguecrack.The system solves the problems during fatigue experiment,such as hard to observe the crack,difficult to get the right time that the crack happens,etc.