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Estimating Life Scatter in Fretting Fatigue Crack Initiation

被引：14
|
作者：
Slack, Trevor S. [1 ]
Leonard, Benjamin D. [1 ]
Sadeghi, Farshid [1 ]
机构：
[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47906 USA
来源：
TRIBOLOGY TRANSACTIONS | 2013年 / 56卷 / 04期
关键词：
Fretting Fatigue; Life Prediction; Finite Element Analysis; DISCRETE DAMAGE MECHANICS; CONTACT STRESS-FIELDS; PREDICTION; NUCLEATION; MODEL;
D O I：
10.1080/10402004.2013.766829
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A new approach was developed to estimate the crack initiation life of a fretting contact while accounting for the variability in the fatigue response. This was accomplished using a modified application of the Smith-Watson-Topper (SWT) fatigue criterion. A combined finite-discrete element model of a cylinder-on-flat configuration incorporating material randomness and disorder via a Voronoi tessellation was developed. The SWT equation was used with this model to predict the crack initiation lives for multiple material domains. The predicted crack initiation lives displayed a large degree of scatter and were less conservative than previous deterministic implementations of the SWT parameter. The scatter in the predicted initiation lives was quantified using Weibull statistics.
引用
收藏
页码：531 / 535
页数：5
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