Fracture test and analysis of notched bars fabricated from Q235 steel at room temperature

doi:10.4028/www.scientific.net/AMM.34-35.1406

CORC > 兰州理工大学 > 兰州理工大学

	Fracture test and analysis of notched bars fabricated from Q235 steel at room temperature
	Wang, Wan-Zhen 1,2; Liu, Wu-Feng 2; Wang, Xin-Tang 1
	2010
会议日期	November 19, 2010 - November 22, 2010
会议地点	Xiangtan, China
关键词	Cracks Fracture testing Manufacture Mechanical engineering Stress analysis Tensile testing Constructional steel Elliptical fracture model Notched bar Room temperature Tensile tests Yield models
卷号	34-35
DOI	10.4028/www.scientific.net/AMM.34-35.1406
页码	1406-1414
英文摘要	Tensile tests at room temperature were performed on 20 notched bars fabricated from constructional steel Q235 specified in Chinese National Standards. The effect of the notch radius, r, and that of the notch depth ratio, d/D, on the fracture model of the constructional steel is examined. The experimental results demonstrate that cracks initiate at the notched section. 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 experimental data are further analyzed using an elliptical yield model together with an elliptical fracture model originally proposed by the first author. The stress field computed from the numerical procedure indicates that the crack initiation occurs at the center of the notched section which experiences the highest stress triaxiality ratio (om/oseq). As the stresses at the notched section reach the limiting values determined from the elliptical fracture model, macroscopic fracture failure in the notched bar occurs. © (2010) Trans Tech Publications.
会议录	Applied Mechanics and Materials
会议录出版者	Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany
语种	英语
ISSN号	16609336
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/116806]
专题	兰州理工大学土木工程学院
作者单位	1.Faculty of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; 2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730055, China
推荐引用方式 GB/T 7714	Wang, Wan-Zhen,Liu, Wu-Feng,Wang, Xin-Tang. Fracture test and analysis of notched bars fabricated from Q235 steel at room temperature[C]. 见:. Xiangtan, China. November 19, 2010 - November 22, 2010.