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Fatigue fracture and fatigue life assessment of railway wheel using non- linear model for fatigue crack growth

机译:利用非线性模型对疲劳裂纹生长的疲劳裂缝和疲劳寿命评估

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摘要

In this paper, the fatigue behavior of railway wheel specimens subjected to cyclic loading have been investigated via experimental tests and numerical analysis. The material behaviour of the wheel specimen has been modelled by means of the Ramberg-Osgood equation. The non-linear Kujawski-Ellyin (KE) model has been adopted for the fatigue crack propagation under small-scale yielding (SSY) conditions. The formulation of the rigid-insert crack closure (RICC) model has been applied to a specimen of railway wheel that has the same conditions as a real instance. The results indicate that the fatigue life of specimens decreases with any increase in load level.
机译:本文通过实验试验和数值分析研究了对循环载荷进行循环载荷的铁路轮样本的疲劳行为。 车轮样本的材料行为通过Ramberg-Osgood方程进行了建模。 非线性Kujawski-Ellyin(KE)模型已采用小规模屈服(SSY)条件下的疲劳裂纹繁殖。 刚性插入裂纹闭合(RICC)模型的配方已应用于具有与真实实例相同的条件的铁路标本。 结果表明,标本的疲劳寿命随着负荷水平的任何增加而降低。

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