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摩擦系数对支承辊次表层接触疲劳损伤的影响

DOI: 10.3969/j.issn.1005-3026.2014.05.028, PP. 731-734

Keywords: 支承辊,正交剪应力,次表层接触疲劳,摩擦系数,应力幅,应力比

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Abstract:

以正交剪应力作为滚动接触次表层疲劳损伤评价的临界应力,分析了摩擦系数对滚动接触次表层正交剪应力幅及应力比的影响规律.根据疲劳损伤累积理论及非对称循环应力幅修正公式,建立了支承辊次表层接触疲劳应力与寿命计算模型,用于评价支承辊次表层接触疲劳损伤.实例分析了摩擦系数对支承辊次表层接触疲劳损伤的影响,结果表明:随着应力比及摩擦系数增大,支承辊的次表层接触疲劳损伤增大,因此,降低支承辊接触摩擦系数,可改善支承辊的疲劳损伤.

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