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含双裂纹齿轮副轮齿裂纹扩展寿命分析
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国家自然科学基金项目(51565039).


Analysis on Tooth Crack Growth Life of a Gear Pair with Double Cracks
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    摘要:

    裂纹扩展是齿轮传动的主要故障,而且裂纹所处位置对裂纹扩展行为作用明显。为探讨齿轮副轮齿裂纹位置与裂纹扩展寿命的关系,提出几种相邻轮齿含分度圆裂纹和齿根裂纹的双裂纹齿轮副模型,基于ABAQUS建立齿轮副的三齿啮合有限元分析模型,分析不同载荷作用下分度圆裂纹和齿根裂纹尖端的主应力值和应力强度因子值;结合Pairs方程探讨分度圆裂纹扩展和齿根裂纹扩展寿命之间的关系。结果表明:齿轮副单齿啮合时的裂纹尖端应力比齿轮副双齿啮合时的裂纹尖端应力大,而且裂纹尖端的弯曲应力明显大于剪切应力;同一载荷同一裂纹深度时,齿根裂纹尖端的应力强度因子值大于分度圆裂纹尖端的应力强度因子值;相同加载时,含齿根裂纹齿轮的裂纹扩展寿命小于含分度圆裂纹齿轮的裂纹扩展寿命;裂纹扩展过程中,齿根裂纹深度和分度圆裂纹深度之比非定值,而且深度之比与载荷无关。

    Abstract:

    Crack growth is one of main failure modes of gear drive,and the effects of crack position on the crack growth is obviously.In order to study the effects of crack position on the tooth crack growth of a gear pair,several models of double crack gear pair with reference circle crack and root crack in neighbour teeth were proposed.The finite element models of gear pair with three teeth meshing were established by the ABAQUS software,and the value of principle stress and the value of stress intensity factor near the crack tip were calculated.The relationship between the reference crack growth life and the root crack growth life was discussed by Pairs equation.The results show that the stress at the crack tip of gear pair in single tooth meshing is greater than that in double tooth meshing,and the bending stress at the crack tip is obviously greater than the shear stress.Under the same load and crack depth,the stress intensity factor at the crack tip of the root is greater than that at the crack tip of the reference circle.Under the same load,the crack growth life of the gear with root crack is smaller than that of the gear with reference crack.In the process of crack growth,the ratio of crack depth between root crack and reference circle crack is nondetermined value,and the ratio is independent of load.

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刘文光,戴文柯,丰霞瑶,马蒙蒙,付业伟.含双裂纹齿轮副轮齿裂纹扩展寿命分析[J].润滑与密封,2019,44(12):52-57.
. Analysis on Tooth Crack Growth Life of a Gear Pair with Double Cracks[J]. Lubrication Engineering,2019,44(12):52-57.

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  • 在线发布日期: 2020-03-19
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