Experiment study and the influence of the stress state to structure steel fracture

doi:10.1109/ICETCE.2011.5774446

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Experiment study and the influence of the stress state to structure steel fracture
	Sun, Yuping; Teng, Zunli; Li, Hui; Wang, Wuxing
	2011
关键词	Building materials Cracks Regression analysis Shear stress Steel construction Steel research Corresponding relations Fracture experiments Fracture strain Notched bar Physical quantities Relation expression Simulated fracture Stress triaxiality
DOI	10.1109/ICETCE.2011.5774446
页码	2177-2179
英文摘要	In order to study crack mechanism in stress triaxiality and fracture design of structure steel, the fracture experiments and numerical simulations were performed on 8 Q345 notched bar. Test results showed that crack initiated at the edge of the hole and the minimum section of the notched bars, quickly propagating perpendicular to loading direction. And that had obviously shear fracture trace, the fracture plane was ductile rupture induced apparently by shear stress, Triaxial stress reaches maximum at most dangerous section thickness center point and the center of the location of the notch. Through the analysis of simulated fracture stress field to the bar with holes indicated that fracture strength of structural steel and stress triaxiality have close relations, Application fracture of stress field of regression analysis, the relation expression between the fracture strength and stress triaxiality is obtained. By taking the stress triaxiality m /e for basic physical quantity, further quantitative analysis show that structural steel fracture with the equivalent strain and fracture surface of the average stress triaxiality have close relations, based on regression analysis, get the corresponding relation curves. © 2011 IEEE.
会议录	2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings
会议录出版者	IEEE Computer Society
语种	中文
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/116292]
专题	土木工程学院
作者单位	School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Sun, Yuping,Teng, Zunli,Li, Hui,et al. Experiment study and the influence of the stress state to structure steel fracture[C]. 见:.