干式膜片弹簧离合器的热应力应变分析

Research on the Thermal Stress and Strain of Dry Diaphragm Spring Clutch

简要介绍热应力理论以及热应力场计算的有限元法基本理论,以干式膜片弹簧离合器为研究对象利用ANSYS进行热应力应变分析。首先建立干式膜片弹簧离合器的三维实体模型,而后在ANSYS软件里建立有限元模型,再确定载荷及边界条件,而后对其进行热应力应变分析,得到短时间内不断的接合与分离,使得摩擦片温度反复升高或降低,这就相当于给摩擦片不断施加交变的热应力和热应变,最终导致摩擦片热疲劳而失效,为进一步研究提供了依据并给设计人员的设计提供一定的指导思路。

This paper briefly introduces the theory of thermal stress and the finite element method for calculating thermal stress field. Taking the dry diaphragm spring clutch as an example, the thermal stress and strain are analyzed in ANSYS. Firstly, the 3D solid model of dry diaphragm spring clutch is established, then the finite element model is established with ANSYS software, and the load and boundary conditions are determined, thus the thermal stress and strain are analyzed and within a short time the continuous engagement and separation are obtained, so the temperature of friction discs repeatedly increased or decreased, which is equivalent to continuously applying alternating thermal stress and strain to the clutch discs. Finally this results the friction discs in thermal fatigue failure, and provides a foundation for the further research and a certain methods for designers.