【摘要】 涂层的机械力学性能对于涂层的应用尤为重要,涂层/基体系统的失效和破坏与涂层表面及界面接触应力密切相关。基于赫兹接触理论,应用有限元法对齿轮涂层接触应力场情况进行模拟。先在没有涂层的系统上对模型的精确性进行检验,然后通过改变涂层的弹性模量比和厚度,探究应力分布规律。结果表明:当涂层/基体弹性模量比Ec/Es<2、涂层厚度/接触半径对t/a=0.05齿轮涂层应力分布最为有利;研究结果为齿轮涂层技术的应用提供了科学的理论依据。更多还原

【Abstract】 It is necessary to study the mechanics performance of thin coating,which composites the prerequisite of coating’s application.The contact stresses are important factors for the design of hard coating/substrate because the failure of the hard coating is usually caused by these stresses.The finite element method is applied to simulate the stress of gear coating with contact load based on Hertz contact theory.The accuracy of model is initially tested in systems without a film.The contact stresses have been calculated based on various coating/substrate modulus ratios and the coating thickness.Results show that when the ratio of coating/substrate modulus is less than 2 and the ratio of(coating thickness)/(contact radius)is 0.05,the effects of coating/substrate combination is perfect.The research has important guiding significance for the application of gear coating.更多还原