Measurement on Fatigue Cracking Thresholds of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames

被引：1
|
作者：
Hu, HaiBin [2 ]
Zhao, YongXiang [1 ]
机构：
[1] Southwest Jiaotong Univ, Inst Engn Reliabil & Safety, Tract Power State Key Lab, Chengdu 610031, Peoples R China
[2] Qiqihaer Railway Rolling Stock Co Ltd, Ctr Tech, Qiqihar 161002, Peoples R China
来源：
MATERIALS AND PRODUCT TECHNOLOGIES | 2010年 / 118-120卷
关键词：
Cast steel; Fatigue; Cracking Threshold; Railway; Rolling wagon; Bogie frame; STRENGTH; DESIGN; MICROSTRUCTURE; RESISTANCE; WEIGHT;
D O I：
10.4028/www.scientific.net/AMR.118-120.111
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurement on fatigue cracking thresholds is investigated to the grade B cast steel for China railway rolling wagon bogie frames. Compact tensional specimens are fatigued under a continuous decreasing loading mode for present study. Results reveal that the minimum test values have different crack growth rates without meeting the code-based rate requirement. Therefore, the test results can not be directly used for measuring the thresholds. A probabilistic modeling in the form of a non-linear law is developed for reflecting the scattered test data. The thresholds at specified reliability levels are then derived in meeting the threshold definition with a specified growth rate. The measurement for the present material has verified the availability of the present modeling.
引用
收藏
页码：111 / +
页数：2
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