超声振动聚合物界面摩擦生热仿真分析

Simulation Analysis of Polymer Interfacial Friction Heating under Ultrasonic Vibration

采用ANSYS和LS-DYNA仿真分析超声振动聚合物界面摩擦生热过程,主要分析超声振幅、超声频率和摩擦因数对界面摩擦生热速率的影响规律。研究结果表明:界面摩擦生热能使聚合物温度升高,且生热是瞬态过程,超声振动作用时间0.164 45s,聚合物界面局部温度能升高到160.7℃,生热速率达到855.57℃/s。界面摩擦生热速率随着超声振幅、超声频率和摩擦因数的增加而增大,超声频率对聚合物界面摩擦生热速率的影响更显著。

ANSYS and LS-DYNA simulation are used to analyze the interfacial of polymer friction heating process of ultrasonic vibration.The influence of ultrasonic amplitude,ultrasonic frequency and friction coefficient on the interfacial friction heating rate is analyzed.The results show that the interfacial friction heating can increase the temperature of the polymer,and the heat generation process is transient.When the ultrasonic vibration action time is 0.164 45 s,the local temperature of the polymer surface can be increased to 160.7 ℃,and the heat generation rate can be attained to 855.57 ℃/s.The generation rate of interfacial friction heating increases with the increasing of ultrasonic amplitude,ultrasonic frequency and friction factor,and the effect of ultrasonic frequency on the interfacial friction heat generation rate of the polymer is more significant.