[1]廖芳芳,李文超,周天华.Q460D高强钢断裂性能试验研究及断裂准则的校准[J].西安建筑科技大学学报：自然版,2016,48(03):362-370.[doi:10.15986/j.1006-7930.2016.03.010]
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Q460D高强钢断裂性能试验研究及断裂准则的校准()
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西安建筑科技大学学报：自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
48
期数:
2016年03期
页码:
362-370
栏目:
出版日期:
2016-06-28

文章信息/Info

Title:
Experimental study on fracture characteristics of Q460D high strength steel and calibration of fracture criterion LIAO Fangfang, LI Wenchao, ZHOU Tianhua
文章编号:
1006-7930(2016)03-0362-09
作者:
廖芳芳; 李文超; 周天华
( 长安大学建筑工程学院,陕西 西安 710061 )
Author(s):
(School of Civil Engineering, Chang’an University, Xi’an 710061,China )
关键词:
Q460D钢; 断裂性能; 断裂准则校准; 扫描式电镜
Keywords:
Q460D structural steel;  fracture behavio ur;  calibration of fracture criterion;  SEM (Scanning Electron Microscope)
分类号:
TU391
DOI:
10.15986/j.1006-7930.2016.03.010
文献标志码:
A
摘要:
为了考察Q460D高强钢在多轴应力状态下的断裂性能，本文分别对切口圆棒试件、剪切型及拉剪型平板切口试件、平板槽口试件进行了断裂试验．随后，利用扫描式电子显微镜对各试件断口处的微观断裂机制进行了观察分析,考察了应力状态对结构钢材断裂性能的影响，并利用试验结果对Rice-Tracey延性断裂准则进行了校准．试验研究结果表明应力状态对 Q460D钢的延性与微观断裂机制有显著的影响．Rice-Tracey延性断裂准则可以准确的捕捉材料因应力三轴度升高引起的延性下降趋势．
Abstract:
In order to study the fracture behavior of Q460 D high strength structural steel under multiaxial stress state, fracture tests on notched round bar specimens, pure-shear and tensile-shear flat specimens and flat grooved plate specimens were conducted. The fracture mechanism of each specimen was observed using the SEM (Scanning Electron Microscope). The effect of stress state on the fracture behavior of the structural steel was studied. Further, the Rice-Tracey fracture criterion was calibrated by using the test results. The experimental results show that the stress state has a significant effect on the ductility and fracture mechanism of the steel. In the meantime, the Rice-Tracey fracture criterion can accurately capture the declined trend of the ductility of the steel due to the increased stress triaxiality.

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备注/Memo

备注/Memo:
基金项目：国家自然科学基金项目（51408055）；中央高校基本科研业务费资助项目（310828151070）
收稿日期：2015-10-16 修改稿日期：2016-06-10
作者简介：廖芳芳（1983－），女，博士，讲师，主要从事钢结构基本理论及应用研究．E-mail：fangfangliao@chd.edu.cn
更新日期/Last Update: 2016-08-05