[1]廖芳芳,唐书凯,涂立尚.Q460D高强钢及对应的ER55-G型焊材的GTN模型参数标定[J].西安建筑科技大学学报(自然科学版),2019,51(05):695-703.[doi:10.15986/j.1006-7930.2019.010.013]
 LIAO Fangfang,TANG Shukai,TU Lishang.Parameter calibration of GTN model of Q460D high strength steel and corresponding ER55-G welding material[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(05):695-703.[doi:10.15986/j.1006-7930.2019.010.013]
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Q460D高强钢及对应的ER55-G型焊材的GTN模型参数标定()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年05期
页码:
695-703
栏目:
出版日期:
2019-12-05

文章信息/Info

Title:
Parameter calibration of GTN model of Q460D high strength steel and corresponding ER55-G welding material
文章编号:
1006-7930(2019)05-00695-09
作者:
廖芳芳唐书凯涂立尚
(长安大学 建筑工程学院,陕西 西安 710061)
Author(s):
LIAO FangfangTANG ShukaiTU Lishang
(School of Civil Engineering,Chang’an University, Xi’an 710061, China)
关键词:
Q460D高强钢 ER55-G型焊材 GTN模型 参数标定 断裂预测
Keywords:
Q460D high strength steel ER55-G welding material GTN model parameter calibration fracture prediction
分类号:
TU511.3
DOI:
10.15986/j.1006-7930.2019.010.013
文献标志码:
A
摘要:
分别对取自Q460D高强钢及对应的ER55-G型焊材的9个光滑圆棒试件和18个圆周平滑槽口试件进行单向拉伸试验,获得基本的力学性能参数、荷载—位移曲线和真实的应力—应变曲线.并通过对18个圆周平滑槽口试件的有限元模拟结果与试验数据进行对比,标定得到Q460D高强钢材及对应的ER55-G型焊材的GTN损伤模型参数.利用标定的GTN模型损伤参数对在Q460D高强钢及对应的ER55-G型焊材取材的圆棒试件的断裂点进行预测,验证所标定参数的准确性.并进一步分析初始微孔洞体积比f0、临界微孔洞体积比fc、最大微孔洞体积比fF和形核孔洞体积分数fN四个损伤参数对断裂预测结果的影响.
Abstract:
The monotonic loading tests were carried out on nine smooth round bars and eighteen circumferentially smooth-notched bar specimens of Q460D high strength steel and the corresponding ER55-G welding material to obtain the basic mechanical properties, load-displacement curves and true stress-strain curves. The GTN model parameters of Q460D high strength steel and the corresponding ER55-G welding material were calibrated according to the experimental and finite element analysis results of eighteen circumferentially smooth-notched bar specimens subjected to monotonic loading. Moreover, the calibrated GTN damage parameters were used to forecast the fracture points of coupon specimens of Q460D high strength steel and the corresponding ER55-G welding material, so as to verify the accuracy of the calibrated parameters. Furthermore, the influences of four damage parameters, including initial void volume fraction f0, critical void volume fraction fc, final failure void volume fraction fF and nucleating volume fraction fN, on fracture prediction results were further analyzed.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-01-21 修改稿日期:2019-09-19基金项目:陕西省自然科学基础研究计划基金项目(2017JM5053); 土木工程防灾国家重点实验室开放基金资助项目(SLDRCE16-04); 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(自然科学类)(300102288106)第一作者:廖芳芳(1983-),女,副教授,博士后,主要从事钢结构教学和科研工作.E-mail: fangfangliao@chd.edu.cn
更新日期/Last Update: 2019-12-05