[1]李晓芃,李朋朋,徐 杰,等.强度匹配对焊接钢管断裂韧性影响的有限元分析[J].焊管,2017,40(2):1-5.[doi:10.19291/j.cnki.1001-3938.2017.02.001]
 LI Xiaopeng,Li Pengpeng,XU Jie,et al.Finite Element Analysis of the Effect of Strength Match on Ductile Fracture Welded Pipe[J].,2017,40(2):1-5.[doi:10.19291/j.cnki.1001-3938.2017.02.001]
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强度匹配对焊接钢管断裂韧性影响的有限元分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
40
期数:
2017年第2期
页码:
1-5
栏目:
试验与研究
出版日期:
2017-02-28

文章信息/Info

Title:
Finite Element Analysis of the Effect of Strength Match on
Ductile Fracture Welded Pipe
文章编号:
10.19291/j.cnki.1001-3938.2017.02.001
作者:
李晓芃李朋朋徐 杰冯 灿樊 宇孙 智
中国矿业大学 材料科学与工程学院, 江苏 徐州 221116
Author(s):
LI Xiaopeng Li Pengpeng XU Jie FENG Can FAN Yu SUN Zhi
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
关键词:
焊管焊接强度匹配裂纹尖端张开位移修正边界层模型失配约束
Keywords:
welded pipe welding strength matching crack tip open displacement(CTOD) modified boundary layer(MBL) model mismatch constraint
分类号:
TG111.91
DOI:
10.19291/j.cnki.1001-3938.2017.02.001
文献标志码:
A
摘要:
为了研究焊接过程中强度匹配对焊接接头断裂韧性的影响,以弹塑性断裂力学理论为基础,基于细观塑性损伤模型,应用ABAQUS软件对大范围屈服条件下的全周向内裂纹管采用轴对称模型及基于小范围屈服的修正边界层模型(MBL)分别进行有限元模拟分析计算。研究结果表明:高配且匹配系数越高,焊接接头的断裂韧性及阻力曲线越高;随匹配系数增加,失配约束M减小,管子的断裂韧性增大;不同强度匹配引起的失配约束差异随裂纹扩展而增大。
Abstract:
In order to study the influence of strength match on welded joint ductile fracture in welding process, based on elastic-plastic fracture theory and microscomic plastic damage model, it respectively carried out finite element simulation analysis and calculation for two kinds of model by using ABAQUS software, one is axisymmetric model for circumferential direction internal crack pipe under wide scale yield condition, the other is modified boundary layer(MBL) model based on small scale yield. The result indicated that the higher matching coefficient is, the higher the fracture toughness of welded joint and resistance curve; with matching coefficient increasing, the mismatch constraint M decreased, and the ductile toughness increased; the difference of mismatch constraint caused by different strength matching increased with the crack growth.

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备注/Memo

备注/Memo:
收稿日期: 2016-12-21
基金项目:国家自然科学基金项目“裂尖约束效应对高钢级管线钢断裂韧性影响的研究”(项目号51301197); 江苏省自然科学基金项目“裂尖约束效应对高钢级管线钢韧性断裂行为影响的研究”(项目号BK20130182);大学生创新训练计划优秀毕设培育项目“强度匹配对高钢级管线钢断裂韧性的影响”(项目号20160545)。
作者简介: 李晓芃(1994—),男,中国矿业大学本科生,主要从事管线钢焊接和断裂数值模拟研究。
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