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[1]伍颖,邹荣,肖洁文,等.含单纯凹陷薄壁不锈钢燃气管道的韧性损伤程度分析[J].中国安全生产科学技术,2018,14(11):82-87.[doi:10.11731/j.issn.1673-193x.2018.11.013]
 WU Ying,ZOU Rong,XIAO Jiewen,et al.Analysis on ductile damage degree of thinwall stainless steel gas pipeline with plain dent[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(11):82-87.[doi:10.11731/j.issn.1673-193x.2018.11.013]
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含单纯凹陷薄壁不锈钢燃气管道的韧性损伤程度分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年11期
页码:
82-87
栏目:
职业安全卫生管理与技术
出版日期:
2018-11-30

文章信息/Info

Title:
Analysis on ductile damage degree of thinwall stainless steel gas pipeline with plain dent
文章编号:
1673-193X(2018)-11-0082-06
作者:
伍颖邹荣肖洁文黄云飞
(西南石油大学 土木工程与建筑学院,四川 成都610500)
Author(s):
WU Ying ZOU Rong XIAO Jiewen HUANG Yunfei
(School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu Sichuan 610500, China)
关键词:
凹陷深度损伤程度Oyane韧性断裂准则有限元线性回归分析
Keywords:
dent depth damage degree Oyane ductile fracture criterion finite element linear regression analysis
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2018.11.013
文献标志码:
A
摘要:
为了分析小尺寸薄壁管道上的凹陷与损伤的关系,在Oyane韧性断裂准则的基础上,采用有限元数值计算方法,研究了管道尺寸、施痕物尺寸等参数变化下,凹陷深度对管道损伤程度的影响规律;对数值模拟结果进行线性回归分析,并根据输出结果,在一定的应用范围内获得了凹陷深度和管道损伤程度的具体数学表达式。研究结果表明:无论沿管道环向还是轴向,Von Mises等效应力最大值都不在凹陷中心,而是在凹陷中心附近;凹陷深度越大,最大等效塑性应变点离凹痕中心越远;凹陷对管道的损伤程度随管道尺寸和压头尺寸的增加而减小,运行内压对损伤程度的影响很小,可以忽略不计。
Abstract:
In order to analyze the relationship between the dent and damage on the small size thinwall pipeline, on the basis of Oyans ductile fracture criterion, the influence of dent depth on the damage degree of pipeline under different pipeline sizes and indenter sizes was studied by using the finite element numerical calculation method. The linear regression analysis was carried out on the numerical simulation results, and according to the output results, the specific mathematical expressions of dent depth and damage degree of pipeline were obtained within a certain range of application. The results showed that regardless of along the circumferential or axial direction of the pipeline, both the maximum values of the Von Mises equivalent stress were not at the center of dent, while near the center of dent. The larger the dent depth, the farther the maximum equivalent plastic strain point away from the center of dent. The damage degree of pipeline caused by the dent decreased with the increase of pipeline size and indenter size, while the operating internal pressure had little effect on the damage degree, which could be ignored.