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Thermomechanical coupling effect on characteristics of oxide film during ultrasonic vibration-assisted ELID grinding zta ceramics

引用

Chinese Journal of Aeronautics 2021年第6期34卷 125-140页

作者： Fan CHEN Guangxi LI Bo ZHAO Wenbo BIE School of Electrical and Mechanical Engineering Pingdingshan UniversityPingdingshan 467000China School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China

Ultrasonic vibration-assisted ELID(UVA-ELID)grinding is utilized as a novel and highly efficient processing method for hard and brittle materials such as *** this study,the UVA-ELID grinding zta ceramics is employed to investigate the influence of thermomechanical loading on the characteristics of oxide *** on the fracture mechanics of material,the model of internal stress for oxide film damage is *** thermomechanical loading is composed of mechanical force and the thermal stress generating from grinding *** theoretical model is established for the mechanical force,thermal stress and internal stress *** the finite element analysis method is used to simulate the theoretical *** mechanical force and grinding temperature is measured during the actual grinding *** the grinding process,the effect of grinding wheel speed and grinding depth on the thermomechanical force and the characteristics of oxide film is *** with the conventional ELID(CELID)grinding,the mechanical force decreased by 25.6%and 22.4%with the increase of grinding wheel speed and grinding depth respectively,and the grinding temperature declined by 10.7%and12.8%during the UVA-ELID *** thermal stress in the latter decreased by 16.3%and20.8%respectively,and internal stress reduced by 12.3%and 15.6%.It was experimentally found that the topographies of oxide layer on the surface of the wheel and the machined surface in the latter was better than that in the *** results indicate that the action of ultrasonic vibration establish a significant effect on the ***,it should be well considered for future reference when processing the zta ceramics.

关键词： Oxide film Surface quality Thermomechanical loading Ultrasonic vibration-assisted ELID grinding zta ceramics

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