接触应力对车轴钢旋转弯曲微动疲劳寿命的影响

研究LZ50车轴钢不同过盈配合接触应力水平对旋转弯盐微动疲劳寿命的影响.分别利用光学显微镜、扫描电子显微镜对过盈配合表面的微动损伤表面和断口进行分析.结果表明,随着过盈量的增加,LZ50车轴钢旋转弯曲微动疲劳寿命呈现先降低而后升高的非线性特征,这是多轴复杂应力、配合面的接触应力、微动摩擦应力以及微动磨损交互作用的结果....

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Bibliographic Details
Published in材料工程 no. 2; pp. 34 - 38
Main Author 宋川 刘建华 彭金方 张林 周琰 朱旻昊
Format Journal Article
LanguageChinese
Published 西南交通大学牵引动力国家重点实验室摩擦学研究所,成都,610031 2014
Subjects
微动疲劳
接触应力
旋转弯曲
车轴
过盈配合
fretting fatigue
press-fit
接触应力
railway axle
过盈配合
微动疲劳
旋转弯曲
rotating bending
contact stress
车轴
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Summary:研究LZ50车轴钢不同过盈配合接触应力水平对旋转弯盐微动疲劳寿命的影响.分别利用光学显微镜、扫描电子显微镜对过盈配合表面的微动损伤表面和断口进行分析.结果表明,随着过盈量的增加,LZ50车轴钢旋转弯曲微动疲劳寿命呈现先降低而后升高的非线性特征,这是多轴复杂应力、配合面的接触应力、微动摩擦应力以及微动磨损交互作用的结果.
Bibliography:11-1800/TB
fretting fatigue ; rotating bending ; railway axle ; contact stress ; press-fit
SONG Chuan, LIU Jian-hua, PENG Jin-fang, ZHANG Lin, ZHOU Yan,ZHU Min-hao （Tribology Research Institute,Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China）
LZ50 railway axle steel were carried out to study the effects of contact stress on rotating bending fretting fatigue life under different press-fit contact stresses. Optical microscope （OM） and Scanning electron microscope （SEM） were used to analyze the press-fit fretting damage surfaces and fracture surfaces, respectively. The results show that the rotating bending fretting fatigue life of the LZ50 present a nonliner feature, decrease with the increase of contact stress firstly, and then increase. It is due to the combination of the complex multiaxial stress of sample, contact stress between contact interfaces, fretting frication stress and the interaction between fretting wear and fretting fatigue.
ISSN:1001-4381
1001-4381
DOI:10.3969/j.issn.1001-4381.2014.02.007