Simulation of fretting wear evolution for fatigue endurance limit estimation of assemblies

Simulation of fretting wear evolution for fatigue endurance limit estimation of assemblies
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微动磨损演化模拟,用于估计组件的疲劳耐久极限

DOI:
10.1016/j.wear.2014.04.013
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发表时间:
2014
期刊:
影响因子:
5
通讯作者:
M. Prölß
M. Prölß
中科院分区:
工程技术1区
文献类型:
--
作者:
B. Zeise;R. Liebich;M. Prölß

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这项工作涉及的审查微动模拟模型开发的柏林技术大学(TUB)。提出的概念的目的是预测组件的疲劳强度受到微动腐蚀。针对这类问题,假设局部疲劳强度计算必须考虑磨损引起的载荷重分布,因此必须施加到磨损表面,提出了一种新的综合建模方法,用于模拟复杂的微动磨损过程,包括磨损和腐蚀,以及在动态载荷下产生的碎片的积累和迁移。所考虑的压配合收缩的特征是碎屑被困在接触区域中,这导致三体问题。数值框架不需要几何更新,因为在这个三体问题中的碎片层是隐含地表示其影响的局部干扰和局部摩擦系数的有限元应力model.The模拟的结果提供信息,以评估裂纹萌生的临界时刻在应力的重新分布。
This work concerns the review of fretting-simulation models developed at the Technical University of Berlin (TUB). The presented concept aims to predict the fatigue strength of assemblies subject to fretting corrosion. For such problems it is assumed that a local fatigue strength calculation has to take into account the redistribution of loads due to wear and hence has to be applied to the worn surface.A novel comprehensive modelling approach is presented for simulating the complex fretting wear process of assemblies including both abrasion and the corrosion, accumulation and transport of the produced debris during dynamic loading. Characteristic of the considered press-fitted-shrink is the debris being trapped in the contact area which leads to a three body problem. The numerical frame does not require geometrical updates since the debris layer in this three body problem is represented implicitly by its influence on the local interference and on the local friction coefficient in the finite element-based stress model.The results of the simulation provide information to assess the critical instant for crack initiation during the redistribution of stresses.
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