Prediction of fatigue limit of journal bearings considering a multi-axial stress state
Prediction of fatigue limit of journal bearings considering a multi-axial stress state
复制标题
考虑多轴应力状态的轴颈轴承疲劳极限预测
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Broeckmann
中科院分区：
文献类型：
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作者：
C. Sous;H. Wünsch;G. Jacobs;C. Broeckmann
目的
本文的目的是调查的适用性二次故障假设（QFH）的径向轴承涂有一个白色金属滑动层的预测安全和不安全的操作条件。该假设涵盖了静态和动态载荷下的操作条件。
设计/方法/方式
材料试验和弹性流体动力学，以及结构，模拟进行提供所需的输入数据的故障假设。对组件样品进行测试，以验证QFH的结果。
结果
利用QFH分析了径向轴承在不同工况下的承载能力。结果允许识别关键和非关键负载条件，并与组件测试结果一致。
独创性/价值
目前的轴颈轴承设计指南没有考虑多轴应力状态和实际应力分布。应用的假设，使考虑多轴性内的滑动表面层，以及确定轴承疲劳的位置，由于材料过载。
Purpose
The purpose of this paper is to investigate the applicability of the quadratic failure hypothesis (QFH) on journal bearings coated with a white metal sliding layer on the prediction of safe and unsafe operating conditions. The hypothesis covers operation conditions under static and dynamical loading.
Design/methodology/approach
Material tests and elastohydrodynamic, as well as structural, simulations were conducted to provide the required input data for the failure hypothesis. Component samples were tested to verify the results of the QFH.
Findings
The load bearing capacity of journal bearings was analysed for different operating conditions by the use of the QFH. Results allow for the identification of critical and non-critical loading conditions and are in accordance with component test results.
Originality/value
Today’s design guidelines for journal bearings do not consider a multi-axial stress state and actual stress distribution. The applied hypothesis enables consideration of multiaxiality inside the sliding surface layer, as well as determining the location of bearing fatigue due to material overload.