铝硅聚苯酯封严涂层切向载荷作用下应力分布的有限元分析

发布时间：2018-04-15 18:16

本文选题：封严涂层 + 切向载荷　；参考：《机械科学与技术》2017年12期

【摘要】：在封严涂层弹性模量试验的基础上,建立封严涂层摩擦有限元模型,对民航发动机铝硅聚苯酯封严涂层的摩擦过程进行有限元分析。分析了摩擦系数、涂层厚度和粘结层厚度等参数对涂层/粘结层/基体系统应力分布的影响。分析结果表明:在切向载荷的作用下,随着摩擦系数的增大,涂层表面、涂层与粘结层的界面以及粘结层和基体界面处的应力峰值均增大;随着涂层厚度的增大,涂层表面及两界面处的应力峰值均减小,但当涂层厚度达到一定程度后,继续增加涂层厚度对降低应力峰值的效果不明显;粘结层厚度在一定范围内的变化对涂层表面和涂层与粘结层界面处的应力变化影响不大,但随着粘结层厚度的减小,粘结层与基体界面处的应力峰值均增大。
[Abstract]:On the basis of the elastic modulus test of sealing coating, the friction finite element model of sealing coating was established, and the friction process of sealed coating of civil aviation engine was analyzed by finite element method.The influence of friction coefficient, thickness of coating and thickness of adhesive layer on the stress distribution of coating / bonding layer / matrix system was analyzed.The results show that under the action of tangential load, the peak stress on the coating surface, the interface between the coating and the bonding layer, and the interface between the coating and the substrate increases with the increase of the friction coefficient, and the thickness of the coating increases with the increase of the thickness of the coating.The peak stress of the coating surface and the two interfaces decreases, but when the coating thickness reaches a certain extent, the effect of increasing the coating thickness on the stress peak is not obvious.The change of bond layer thickness in a certain range has little effect on the stress change of the coating surface and the interface between the coating and the bonding layer, but with the decrease of the bonding layer thickness, the stress peak value at the interface between the bond layer and the substrate increases.
【作者单位】：天津大学内燃机燃烧学国家重点实验室;天津大学仁爱学院;
【基金】：国家自然科学基金项目(U1233201) 高等学校博士学科点专项科研基金项目(20130032130005) 中国民航局科技计划项目(MRHD20160106)资助
【分类号】：TG174.4

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