Numerical Estimation of Fretting Fatigue Lifetime Using Damage and Fracture Mechanics
Numerical Estimation of Fretting Fatigue Lifetime Using Damage and Fracture Mechanics
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DOI：
10.1007/s11249-013-0189-8
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发表时间：
2013-07
影响因子：
3.2
通讯作者：
Reza Hojjati-Talemi;M. Wahab;E. Giner;M. Sabsabi
中科院分区：
文献类型：
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作者：
Reza Hojjati-Talemi;M. Wahab;E. Giner;M. Sabsabi
微动疲劳是一种复杂的摩擦学现象，它会导致具有较小相对振荡运动的连接部件过早失效。在裂纹萌生和裂纹扩展中所花费的微动疲劳寿命的分数取决于许多因素，例如，接触应力、滑动量、频率、环境条件等，并且从一个应用到另一个应用是不同的。因此，裂纹萌生和扩展阶段在微动疲劳分析中是重要的。在这项调查中，数值方法被用来预测这两个部分，并估计微动疲劳失效寿命下的共形接触配置。基于连续介质损伤力学的基本原理，提出了一种非耦合损伤演化规律。扩展有限元法用于计算裂纹扩展寿命。估计结果与以前报道的实验数据进行了验证，并与文献中的其他可用的方法进行了比较。
Fretting fatigue is a complex tribological phenomenon that can cause premature failure of connected components that have small relative oscillatory movement. The fraction of fretting fatigue lifetime spent in crack initiation and in crack propagation depends on many factors, e.g., contact stresses, amount of slip, frequency, environmental conditions, etc., and varies from one application to another. Therefore, both crack initiation and propagation phases are important in analysing fretting fatigue. In this investigation, a numerical approach is used to predict these two portions and estimate fretting fatigue failure lifetime under a conformal contact configuration. For this purpose, an uncoupled damage evolution law based on principles of continuum damage mechanics is developed for modelling crack initiation. The extended finite element method approach is used for calculating crack propagation lifetimes. The estimated results are validated with previously reported experimental data and compared with other available methods in the literature.