Fatigue Test of the Butt Joints of 16MnR Base Material

WANG Jianbin¹  WU Pingbo¹  CHEN Xihong²  LI Guanjun²

(1. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031;
2. Technical Center, Zhuzhou Electric Locomotive Ltd., Zhuzhou 412001)

Abstract: Fatigue failures of welding bogie frames are critical issues when vehicles run at higher speeds. Traditionally, foreign welding standards are used for the design and evaluation fatigue strength of bogie frame as the reasons of inadequate fatigue performance data which are applicable to our own base materials and welding joints. To build database for rail vehicle industry becomes a necessary issue. The 16MnR butt joints were tested on RUMAL high frequency electromagnetism fatigue test machine. Median S-N and design S-N curves with 95% possibility of survival and 90% confidence level of joints were obtained by using group method and staircase method. Goodman-Smith fatigue limit diagram was obtained through 8 points method. All these data supply basic fatigue performance information for fatigue design and evaluation fatigue life of welding bogie frame.

Key words: Fatigue test  P-C-S-N curve  Correctional  Goodman-Smith diagram

CLC No: TG403 TG44444

高等学校科技创新工程重大项目培养基金(705044)、教育部创新群体(IRT0452)、国家高技术研究发展计划(863计划, 2006AA04Z406)和西南交通大学研究生创新基金资助项目. Received 20070919, received in revised form 20071116

References　

[1] Ministry of Railways. TB/T 1335-1996 Strength design of the railway vehicle and experimental identification criterion[S]. Beijing: China Railway Publishing House, 1996.
[2] Ministry of Railways. SIF[2001]No. 21 temporary quali- fication for strength design and test of rolling stock running at 200 km/h and above[S]. Beijing: China Railway Publishing House, 2001.
[3] LIN S K, LEE Y L, LU M W. Evaluation of the staircase and the accelerated test methods for fatigue limit distributions[J]. International Journal of Fatigue, 2001, 23: 75-83.
[4] XIANG Bin, SHI Jianping, GUO Lingyan, et al. Plotting and application of Goodman fatigue limit diagram of railway common materials[J]. China Railway Science, 2002, 23: 72-76.
[5] JIANG Jianhua, ZHAO Honglun. The experimental research of Goodman fatigue diagram[J]. Journal of Shanghai Railway University (Natural Science Edition), 2000, 21: 8-11.