摘要
利用RAM-5000 SNAP声学测试系统,对包含疲劳微裂纹以及疲劳初期损伤的金属构件的不同区域进行了非线性超声实验测量。实验结果表明该试件的微裂纹区和疲劳损伤区的测量相对非线性系数相较于未损伤区明显提升。通过该技术可以发现常规无损检测手段难以检测的微损伤,可面向更高的检测需求.更大程度地做到“防患于未然”,保障特种设备结构部件安全运行。
The nonlinear ultrasonic effects in different areas of a metal fatigue specimen with fatigue crack and early fatigue damage are measured by RAM-5000 SNAP system.The experimental results show that the measured relative nonlinear parameters in the fatigue crack and fatigue damage areas are significantly higher than those in the undamaged area.The nonlinear ultrasonic technology provides quantitative detection of the micro-damage that cannot be identified by the conventional nondestructive testing methods.Therefore it could match higher testing requirements,and nip the risks in the bud to a greater extent,ensuring the safe operation of structural components in special equipment.
作者
郭勇
李菊峰
王璇
牛卫飞
Guo Yong;Li Jufeng;Wang Xuan;Niu Weifei(Tianjin Special Equipment Inspection Institute,Tianjin 300192)
出处
《中国特种设备安全》
2020年第9期43-48,共6页
China Special Equipment Safety
基金
国家市场监督管理总局技术保障专项项目(批准号:2019YJ005)
天津市市场和质量监督管理委员会科技计划项目(批准号:2018-W21)。
关键词
非线性超声技术
疲劳初期损伤
疲劳微裂纹
Nonlinear ultrasonic technology
Early fatigue damage
Fatigue crack
