Random Fatigue Crack Growth Rates of China Railway Grade B Cast Steel Wheel

被引：0
|
作者：
Zhao, Y. X. [1 ]
Yang, B. [1 ]
Song, G. X. [2 ]
机构：
[1] SW Jiaotong Univ, Inst Engn Reliabil & Safety, Tract Power State Key Lab, Chengdu 610031, Peoples R China
[2] Datong ABC Castings Co Ltd, Tech Ctr, Datong 037038, Peoples R China
来源：
MATERIALS ENGINEERING FOR ADVANCED TECHNOLOGIES, PTS 1 AND 2 | 2011年 / 480-481卷
关键词：
Railway; Wheel; Grade B cast steel; Fatigue; Crack growth rate;
D O I：
10.4028/www.scientific.net/KEM.480-481.387
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fracture surface observations and statistical deriving are applied for the present investigation on the random fatigue crack growth rates of China grade B cast steel wheel. Results reveal that: the crack grows with relative regular initial tip companied fabric like stripes along the growth direction but few of fatigue striations, and then, cleavage flowers appearing on the district of transient fracture with few of dimples. It indicates that sharp notched structural crack behaviour acts as a few of plastic dissipation process. Non-linear statistical modeling covering entire three pieces of fatigue crack growth is constructed for describing the random crack growth rates. Scattered randomness of the growth rates has been well characterized.
引用
收藏
页码：387 / +
页数：2
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