功能梯度涂层结构的轴对称热弹性接触与旋转滑动的动态稳定性研究

The theoretical analysis model for axi-symmetric thermoelastic contact problem of functionally graded material (FGM) coated structure coating with arbitrarily varying material parameters is established in this project. And some axi-symmetric thermoelastic contact problems of FGM coated structure are studied. The main contents include: The axi-symmetric thermoelastic frictionless contact problem of FGM coated structure; The axi-symmetric thermoelastic rotation frictional sliding and dynamic instability of FGM coated structure under considering frictional heat. The main aims of this research project are to examine the effects of the gradient types of the coating parameters on thermoelastic characteristics, and discuss how to improve thermoelastic sliding stability and the resistance to thermoelstic contact damage through altering the distribution of contact stress and surface temperature by adjusting the gradient type of the coating. This present project, which will provide theoretical basis for the application of functionally graded material, is significant to optimal design and practical applications of material surface for purpose of improving the resistance to thermoelastic contact damage and dynamic instability.

本项目将建立适用于材料参数任意连续变化的梯度材料涂层结构的轴对称热弹性接触问题的理论分析模型，对梯度材料涂层结构的若干基本轴对称热弹性接触问题进行研究。主要内容包括：梯度涂层结构的轴对称热弹性无摩擦热接触问题；考虑摩擦生热的梯度材料涂层结构的轴对称热弹性旋转摩擦滑动及其动态稳定性问题。主要目的是考查涂层参数梯度变化的不同形式对热弹性特性的影响，研究如何通过改变涂层梯度变化调节接触力和表面温度分布，提高热弹性滑动的稳定性，改善热弹性接触损伤。该项目的研究将为功能梯度材料的应用提供理论基础，对材料表面抵抗热接触损伤和滑移稳定性的优化设计具有积极的意义。

本项目针对梯度材料涂层结构的摩擦滑动热弹性接触以及旋转动态稳定性问题展开理论研究，以探讨利用梯度涂层改进热弹性摩擦接触损伤和滑移动态稳定性的可能。主要内容包括：考虑摩擦生热的梯度涂层结构的摩擦滑移动态稳定性问题；双管热交换问题；梯度涂层结构轴对称热弹性旋转摩擦接触问题。主要目的是考查涂层参数梯度变化对热弹性特性的影响，研究如何通过改变涂层梯度变化来调节接触力和表面温度分布，提高热弹性滑动的稳定性，改善热接触损伤。该项目不仅完善了功能梯度涂层结构的热弹性接触及旋转动态稳定性问题的理论研究，而且对以改善热弹性接触损伤和滑移动态稳定性为目的的功能梯度涂层的优化设计和工程应用具有重要意义。