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首页> 外文期刊>Tribology International >Numerical study on the influence of artificial internal stress relief groove on fretting fatigue in a shrink-fitted assembly
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Numerical study on the influence of artificial internal stress relief groove on fretting fatigue in a shrink-fitted assembly

机译：人工内应力消除槽对收缩组件中疲劳疲劳影响的数值研究

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Fretting fatigue failure occurs in shrink-fitted assemblies due to the combination of high stresses and relative displacements near the contact edge. Due to these high stresses, fatigue crack initiates followed by crack propagation until final rupture. Additive manufacturing (AM) is a game changing technology, which enables new component capabilities that cannot be manufactured with conventional techniques. This research work analyses numerically the influence of an artificial internal stress relief toroidal groove inside a shrink-fitted shaft, which could be manufactured using AM technology. Due to the toroidal void, the stress/strain fields are redistributed improving the fretting fatigue crack initiation and propagation lifetimes. To do so, 2D finite element models are created in Abaqus software with and without the internal groove. To estimate the fretting fatigue initiation and propagation lifetime and crack propagation direction, critical plane methods are used. In terms of the crack propagation, eXtended Finite Element Method (XFEM) is used to simulate mixed mode crack advancing in a single mesh structure. Finally, the obtained results with and without void were compared concluding with significant improvements in terms of total fatigue lifetime.
机译：由于接触边缘附近的高应力和相对位移的组合，在收缩装配的组件中发生疲劳失败。由于这些高应力，疲劳裂纹引发，然后裂纹繁殖直至最终破裂。添加剂制造（AM）是一种游戏改变技术，它可以通过传统技术制造不能制造的新组件能力。该研究工作分析了人造内应力释放环形槽内部的影响铰接轴内的影响，这可以使用AM技术制造。由于环形空隙，重新分布应力/应变场改善了疲劳疲劳裂纹引发和繁殖寿命。为此，在ABAQUS软件中使用内部凹槽创建2D有限元模型。为了估计微动机起始和传播寿命和裂纹传播方向，使用临界平面方法。就裂缝传播而言，扩展有限元方法（XFEM）用于模拟在单网结构中推进的混合模式裂纹。最后，在总疲劳寿命方面比较了与没有空隙的结果和不具有空隙的结果。

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