Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model

doi:10.1111/j.1460-2695.2010.01443.x

CORC > 兰州理工大学 > 兰州理工大学

	Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model
	Wang, W.2,3; Qian, X.1; Su, R.2; Wang, X.3
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2010-05
卷号	33 期号:5 页码:310-319
关键词	ductility fracture criterion generalized yield model high strength steels notched bars stress concentration
ISSN号	8756-758X
DOI	10.1111/j.1460-2695.2010.01443.x
英文摘要	This article summarises the uniaxial tension tests for 20 notched bars fabricated from high strength steel Q345 specified in Chinese National Standards. The effects of the notch radius, r, and that of the notch depth ratio, d/D, on the ductility and fracture resistance of this high strength steel are examined. The experimental data are further analyzed using a generalized yield model together with an elliptical fracture stress envelope originally proposed by the first author. The experimental results demonstrate that cracks initiate at the notched section, with the fracture surface filled with many dimples and shearing marks. Specimens with a sharper notch radius (a smaller r) and a larger notch depth (a smaller d/D ratio) show poor ductility, but high fracture strength. The stress field computed from the numerical procedure including the generalized yield model indicates that the crack initiation occurs at the centre of the notched section which experiences the highest stress triaxiality ratio (Sigma(m)/Sigma(seq)). As the stresses at the notched section reach the limiting values determined from the elliptical fracture criterion, macroscopic fracture failure in the notched bar occurs.
资助项目	Chinese Natural Science Foundation[50808098]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000276466200006
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35246]
专题	兰州理工大学
通讯作者	Qian, X.
作者单位	1.Natl Univ Singapore, Dept Civil Engn, Singapore 117548, Singapore 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Peoples R China 3.Ningbo Univ, Fac Architectural Civil Engn & Environm, Ningbo 315211, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, W.,Qian, X.,Su, R.,et al. Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2010,33(5):310-319.
APA	Wang, W.,Qian, X.,Su, R.,&Wang, X..(2010).Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,33(5),310-319.
MLA	Wang, W.,et al."Tensile tests and analyses of notched specimens fabricated from high strength steels using a generalized yield model".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES 33.5(2010):310-319.