General Strength Models of Constructional Steel and Fracture Analysis of Notched Bars

被引：0
|
作者：
Wang, Wanzhen [1 ]
机构：
[1] Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Peoples R China
来源：
ICIC 2009: SECOND INTERNATIONAL CONFERENCE ON INFORMATION AND COMPUTING SCIENCE, VOL 4, PROCEEDINGS | 2009年
关键词：
TRIAXIALITY; STRESS;
D O I：
10.1109/ICIC.2009.353
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Fracture test was performed on 10 notched bars to study fracture mechanism of constructional steel. Test results indicated that plastic deformation concentrated in notch region and crack initiated at center of notched root. Notched bars finally fractured at notched section where stress triaxiality was larger. Fracture mode was combination of shear and normal fracture. According to hydrostatic yield conception of metal, new annotation was given to generalized yield ellipsoidal function of constructional steel. The ellipsoidal fracture function and its parameters were deduced on the assumption that constructional steel yielded and fractured at the same time in tri-axial mean tension stress state. Simulation results of notched bar fracture test showed that fracture took place when the fracture ellipsoidal function reached a critical value.
引用
收藏
页码：170 / 173
页数：4
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