S135钻杆钢的拉扭复合加载疲劳行为

采用疲劳实验和回归分析相结合的方法，研究了s135钻杆钢在拉扭复合加载条件下的疲劳行为，并对疲劳断口进行了微观分析。结果表明：，由拉扭应力幅对应的当量应力表示的疲劳寿命公式可很好地描述S135钻杆钢的拉扭疲劳寿命规律；疲劳断口由疲劳源区、疲劳裂纹稳定扩展区和快速瞬断区组成，疲劳裂纹从试样表面萌生，并向试样内部扩展，且常为多疲劳源，不同疲劳源断口的连接和复合加载形成所谓的“屋脊”状特征；拉扭疲劳断裂试样裂纹源区的微观断口特征为明显的河流花样，裂纹扩展区的微观断口特征为疲劳条带与涟波状花样。...

Full description

Saved in:
Bibliographic Details
Published in材料工程 no. 1; pp. 40 - 44
Main Author 雒设计 赵康 王荣
Format Journal Article
LanguageChinese
Published 西安理工大学材料科学与工程学院,西安710048 2013
西安石油大学材料科学与工程学院,西安710065%西安理工大学材料科学与工程学院,西安,710048%西安石油大学材料科学与工程学院,西安,710065
Subjects
S135钻杆钢
双轴疲劳
同相位
拉扭复合加载
断口
双轴疲劳
断口
S135钻杆钢
同相位
拉扭复合加载
Online AccessGet full text
ISSN1001-4381
1001-4381
DOI10.3969/j.issn.1001-4381.2013.01.009

Cover

More Information
Summary:采用疲劳实验和回归分析相结合的方法，研究了s135钻杆钢在拉扭复合加载条件下的疲劳行为，并对疲劳断口进行了微观分析。结果表明：，由拉扭应力幅对应的当量应力表示的疲劳寿命公式可很好地描述S135钻杆钢的拉扭疲劳寿命规律；疲劳断口由疲劳源区、疲劳裂纹稳定扩展区和快速瞬断区组成，疲劳裂纹从试样表面萌生，并向试样内部扩展，且常为多疲劳源，不同疲劳源断口的连接和复合加载形成所谓的“屋脊”状特征；拉扭疲劳断裂试样裂纹源区的微观断口特征为明显的河流花样，裂纹扩展区的微观断口特征为疲劳条带与涟波状花样。
Bibliography:LUO She-ji ,ZHAO Kang ,WANG Rong （1 School of Materia Technology, Xi ~ an 7 ls Science and Engineering,Xi~an Universit 10048, China ; 2 School of Materials Science Engineering, Xi＇ an Shiyou University,Xi＇an 710065 ,Ch y of and ina）
11-1800/TB
S13 5 drill pipe steel biaxial fatigue in-phase combined axial-torsional loading fracture
Biaxial fatigue behavior under combined axial and torsional loading for $135 drill pipe steel was investigated by means of fatigue tests and data regression analysis methods, and the fracture sur- faces were observed through scanning electron microscopy. The results show that when is 0.7 the fatigue life regulation of 8135 drill pipe steel under combined axial and torsional loading can be re- presented well by the fatigue life equation, which is expressed by equivalent stress of tension-torsion stress amplitude. The fracture surfaces are mainly divided into three regions such as the crack initia- tion, steady crack propagation and instantaneous fracture. Fatigue cracks mainly initiate
ISSN:1001-4381
1001-4381
DOI:10.3969/j.issn.1001-4381.2013.01.009