Effects of tooth plastic inclination deformation due to spatial cracks on the dynamic features of a gear system

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• 作者：Wennian Yu ; Chris K. Mechefske ; Markus Timusk
• 关键词：Spatial crack ; Plastic inclination deformations ; Mesh stiffness ; Dynamic load factor
• 刊名：Nonlinear Dynamics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：87
• 期：4
• 页码：2643-2659
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems, Control; Classical Mechanics; Mechanical Engineering; Automotive Engineering;
• 出版者：Springer Netherlands
• ISSN：1573-269X
• 卷排序：87

文摘

Spatial cracks may occur in the gear tooth fillet region due to the presence of non-uniform load distribution, local non-homogeneity of material quality, and potential misalignment of gear shafts and bearings, among other things. Previous researchers have discussed the tooth plastic inclination deformation due to a uniform depth planar crack. To the best of the authors’ knowledge, the non-uniform depth spatial crack has not been included in previous analyses. This paper presents a tooth plastic inclination model to analytically calculate the three-dimensional distributions of tooth plastic deformations due to spatial cracks based on the slicing principle. In addition, their influence on the dynamic performance of a spur gear pair was studied by building six-degrees-of-freedom model. The simulated results reveal that the non-uniformity of the crack depth along the tooth width direction could lead to uneven dynamic load distributions on the cracked tooth flank, which may excite a tilting motion of the gears. The larger the tooth plastic inclination angle, the higher the amplitude of the tilting motion that would be excited.