[1]叶运勤,苗张木,孙洋洋.EQ70钢CTOD断裂韧度评估及允许值确定[J].焊管,2013,36(8):17-20.[doi:1001-3938(2013)08-0004-17]
 YE Yunqin,MIAO Zhangmu,SUN Yangyang.Assessment of EQ70 Steel CTOD Fracture Toughness and Determination of the Allowed Value[J].,2013,36(8):17-20.[doi:1001-3938(2013)08-0004-17]
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EQ70钢CTOD断裂韧度评估
及允许值确定
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
36
期数:
2013年第8期
页码:
17-20
栏目:
试验与研究
出版日期:
2013-08-28

文章信息/Info

Title:
Assessment of EQ70 Steel CTOD Fracture Toughness and Determination of the Allowed Value
文章编号:
1001-3938(2013)08-0004-17
作者:
叶运勤苗张木孙洋洋
(武汉理工大学 交通学院,武汉 430063)
Author(s):
YE YunqinMIAO ZhangmuSUN Yangyang
(School of Transportation,Wuhan University of Technology,Wuhan 430063, China)
关键词:
EQ70钢CTOD允许值
Keywords:
EQ70 steel CTOD allowed value
分类号:
TG115.57
DOI:
1001-3938(2013)08-0004-17
文献标志码:
A
摘要:
采用传统方法评定EQ70钢断裂韧度CTOD值是否优良时,通常将基于英国BS7448规范测试的CTOD断裂韧度最小值与CTOD允许值δmin进行比较,当EQ70钢CTOD断裂韧度最小值大于CTOD允许值δmin时,则EQ70钢的CTOD断裂韧度优良,此方法局限于能够查阅到EQ70钢的CTOD允许值δmin,但国内外规范中很少对CTOD允许值δmin做明确规定。基于英国BS7910《金属结构缺陷可接受性评定方法指南》的失效评定曲线对EQ70钢的断裂韧度CTOD合格性进行评定,能够克服传统方法的不足。同时依据BS7910规范还可以推导出EQ70钢CTOD允许值δmin,比传统的工程方法“母材参考法”和“类比法”具有优越性。
Abstract:
The traditional method for evaluation fracture toughness of EQ70 steel CTOD value, through the comparison of the minimum value of CTOD fracture toughness which is based on BS7448 specification test and the allowed value CTOD δmin . When the minimum value of EQ70 steel CTOD fracture toughness is greater than the minimum allowed value δmin , the CTOD fracture toughness value of EQ70 steel is good, this method is limited to refer to EQ70 steel CTOD allowed value of δmin, but the CTOD allowed value δmin rarely is specified in the specifications at home and abroad. The assessment of EQ70 steel fracture toughness CTOD conformity based on the failure assessment curve of BS7910 Metal Structure Defect Acceptable Guidelines evaluation method, can overcome the insufficient of traditional method. According to the BS7910 specification, EQ70 steel CTOD allowed value δmin derived  is superior than those of engineering methods base metal reference methods and method of analogue.

参考文献/References:

[1] 苗张木, 陶德馨, 杨荣英. 焊接接头韧度 CTOD 评定的适用性与允许值研究[J]. 机械强度,2006,28(01):150-155.
[2] 杨新歧,王东坡,李小巍,等. 海洋石油平台焊接接头大型 CTOD试验[J]. 焊接学报,2002,23(04):48-52.
[3] 许文兵. 裂纹尖端张开位移试验在平台建造中的应用 [J]. 中国海洋平台,1999 (05):10-14.
[4] 张玉玲,王冒明,吴新如,等. 铁路桥梁钢及焊缝的 CTOD 性能[J]. 清华大学学报(自然科学版),2005,45(05):585-588.
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[6] 冷晓畅.超高强钢焊接接头CTOD评定的概率方法[J].武汉理工大学学报(交通科学与工程版),2011,35(05):1091.
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备注/Memo

备注/Memo:
作者简介:叶运勤(1988—),男,武汉理工大学交通学院在读研究生,工程力学专业,研究方向为结构完整性评估、钢材断裂韧度CTOD试验及焊接数值模拟。
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