Research on Measurement Method and Distribution Law of Contact Stress on Casing Flange
AI Yanting1, WANG Yinhu1, LIU Yu1, TIAN Jing1, FU Pengzhe2, LIU Shiyun2
1. Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System,
School of Aero-Engine, Shenyang Aerospace University, Shenyang 110136, China;
2. AECC Shenyang Engine Research Institute, Shenyang 110015, China
This study is aimed at investigating the measurement of contact stress and its distribution pattern across the attachment surface of an aero-engine casing flange. To begin with, a dynamic contact stress measurement system for casing flanges was established based on MXene flexible pressure sensors with an ultra-wide pressure monitoring range. The measurement system was sandwiched by two flanges, and up to 13 measurement points were distributed therein. The stress changes of the corresponding measurement points were obtained in real time according to the time-domain response of the sensor resistance change rate and the pressure calibration curve. The comparison of the test results with the simulation shows satisfactorily consistent trends, displaying stress errors lower than 7%. Subsequently, the influence of structural parameters and pre-tightening torque on contact stress were studied, and possible measures for improving the sealing performance were applied. The findings suggest that not only can the proposed analytical method and measurement system provide accurate dynamic measurements for contact stresses, but the studied influencing relationship can also serve as a reliable reference for upcoming sealing performance optimization design for flanges. Last but not least, owing to the universal applicability of the methods presented, this research method also offers an invaluable guidance for contact stress measurements and distribution analyses of various casing flanges.
艾延延,王银虎,刘玉,田晶,付鹏哲,刘仕运. 机匣安装边接触应力测量方法与分布规律研究[J]. 航空制造技术, 2023, 66(19): 76-83.
AI Yanting, WANG Yinhu, LIU Yu, TIAN Jing, FU Pengzhe, LIU Shiyun. Research on Measurement Method and Distribution Law of Contact Stress on Casing Flange[J]. Aeronautical Manufacturing Technology, 2023, 66(19): 76-83.