Mechanics and behaviour of hollow cylindrical members in rolling contact
Mechanics and behaviour of hollow cylindrical members in rolling contact
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DOI：
10.1016/0043-1648(83)90132-1
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发表时间：
1983-06
期刊：
影响因子：
5
通讯作者：
C. Murthy;A. Rao
中科院分区：
文献类型：
--
作者：
C. Murthy;A. Rao
研究了空心圆柱单元的接触力学问题。空心圆柱体的最大接触应力小于实心圆柱体。提出了一种简单的计算接触应力的方法，即通过计算接触应力方程中的空心圆柱体的等效弹性模量来计算接触应力，并对相同材料、相同外形尺寸的空心圆柱体和实心圆柱体进行了滚动接触疲劳试验，结果表明，空心圆柱体的滚动接触疲劳性能明显优于实心圆柱体，这一结果可归因于中空试样中较低的接触应力。点蚀是所有受试和失效样本的失效模式。微观研究表明，在许多有坑的空心试样的弯曲疲劳裂纹已开始在内表面。
The mechanics of contact of hollow cylindrical elements were studied. The maximum contact stress is less for a hollow cylinder than for a solid cylinder. A simple numerical method is proposed to estimate the reduced contact stress by finding an equivalent modulus of elasticity for the hollow cylinder for use in the contact stress equation.Rolling contact fatigue experiments conducted on hollow and solid cylindrical specimens of the same material and same external dimensions revealed that the hollow specimens performed much better than the solid specimens, a result which can be attributed to the lower contact stress in hollow specimens. Pitting was the mode of failure for all the tested and failed specimens. Microscopic studies revealed that in many of the pitted hollow specimens flexural fatigue cracks had initiated at the inner surface.