[1]廖芳芳,王睿智,李文超,等.Q460钢基于微观机制的延性断裂判据研究[J].西安建筑科技大学学报(自然科学版),2016,48(04):535-543.[doi:10.15986/j.1006-7930.2016.04. 013]
 LIAO Fangfang,WANG Ruizhi,LI Wenchao,et al.Study on micro mechanism-based ductile fracture criteria for Q460 steel[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2016,48(04):535-543.[doi:10.15986/j.1006-7930.2016.04. 013]
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Q460钢基于微观机制的延性断裂判据研究()
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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:
48
期数:
2016年04期
页码:
535-543
栏目:
出版日期:
2016-08-31

文章信息/Info

Title:
Study on micro mechanism-based ductile fracture criteria for Q460 steel
文章编号:
1006-7930(2016)04-0535-09
作者:
廖芳芳王睿智李文超周天华
(长安大学建筑工程学院,陕西 西安 710061)
Author(s):
LIAO Fangfang WANG Ruizhi LI Wenchao ZHOU Tianhua
( School of Civil Engineering, Changan University, Xian 710061, China;)
关键词:
断裂微观机制模型参数校准裂后路径
Keywords:
Fracture Micromechanical model Parameter calibration Post fracture path
分类号:
TU391
DOI:
10.15986/j.1006-7930.2016.04. 013
文献标志码:
A
摘要:
基于微观机制的断裂模型可用来预测钢结构的延性断裂.为校准Q460钢的微观断裂模型参数,进行了材料试验和对应的有限元分析,以及断口的扫描电镜试验.试件由Q460钢板焊接节点抽取的母材和熔敷金属圆棒制作而成.用自编的VUMAT子程序,分别以校准的应力修正临界应变模型(SMCS)和空穴扩张模型(VGM)为断裂判据,分析了18个圆周平滑槽口单向拉伸试件的开裂全过程,得到了裂后荷载位移曲线,其与试验结果吻合较好,验证了SMCS和VGM模型用于节点裂后路径分析的可行性.
Abstract:
Micromechanical facture models can be used to predict ductile fracture in steel structures. In order to calibrate the parameters in the micromechanical models for Q460 steel, material tests, their corresponding finite element analyses, and scanning electron microscope tests were conducted. The test specimens were made from round bars of base metal and deposit metal extracted from welded connections of Q460 steel plates. The VUMAT subroutine edited by the author was employed. Taking the calibrated stress modified critical strain (SMCS) model and void growth model (VGM) as fracture criteria, the whole cracking processes of eighteen circumferentially smooth-notched tensile specimens were simulated, the post-fracture load displacement curves were obtained, which are close to the test results. The results verify the feasibility of using SMCS and VGM models in the post fracture path analysis of connections

参考文献/References:

References
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备注/Memo

备注/Memo:
收稿日期: 2015-10-08 修改稿日期:2016-08-01
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)
作者简介:廖芳芳(1983?),女,讲师,博士后,主要从事钢结构教学和科研工作.Email: fangfangliao@chd.edu.cn
更新日期/Last Update: 2016-10-30