[1]于国鹏,段庆全,张 宏.Paris公式疲劳常数测定的有限元方法[J].焊管,2009,32(6):18-20.[doi:1001-3938(2009)06-0018-03]
 YU Guo-peng,DUAN Qing-quan,ZHANG Hong.The fatigue constant of Paris formula gained by finite element method[J].,2009,32(6):18-20.[doi:1001-3938(2009)06-0018-03]
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Paris公式疲劳常数测定的有限元方法
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
32
期数:
2009年第6期
页码:
18-20
栏目:
试验与研究
出版日期:
2009-06-28

文章信息/Info

Title:
The fatigue constant of Paris formula gained by finite element method
文章编号:
1001-3938(2009)06-0018-03
作者:
于国鹏段庆全张 宏
(中国石油大学,北京 102249)
Author(s):
YU Guo-pengDUAN Qing-quanZHANG Hong
(China University of Petroleum,Beijing 102249,China)
关键词:
疲劳常数有限元塑性累积退化奇异单元裂纹扩展
Keywords:
fatigue constantfinite elementplastic accumulationsingular degeneration elementcrack propagation
分类号:
TG115.9
DOI:
1001-3938(2009)06-0018-03
文献标志码:
A
摘要:
基于材料疲劳常数测定的经济性和对疲劳问题的有限元模拟研究,采用了高精度二次单元来建模,并对裂尖单元进行了奇异退化、对裂尖局部进行了网格细化;基于材料的塑性累积特性,采用随动强化材料模型,以材料抗拉强度作为裂纹开裂准则;通过有限元对实例进行了模拟分析,并与试验值进行了对比,说明了本模拟方法的精度和可靠性,为疲劳问题的有限元模拟提供了一定的借鉴。
Abstract:
Considering the expenditure of the material fatigue constant achieved through experiment and fatigue problem researched with finite element method,this paper has adopted high precision quadratic element to build the finite element model, has conducted singular degeneration on the crack tip and mesh detailing on part crack tip.Since the metal has a property of plastic accumulation,adopting following aggrandizement material model,the material tensile strength was defined as crack propagation norm.In this paper, an actual example is analyzed and compared with the experiment,which can verify the accuracy and the reliability of the finite element method.So,it can supply a good reference for the fatigue problem researched with the finite element simulation method.

参考文献/References:

[1]GB/T 6398—2000,金属材料疲劳裂纹扩展速率试验方法[S].
[2]张松林.多裂纹板破坏过程模拟及寿命预计[D].南京:南京航空航天大学.2006:16-19.
[3]白永强,帅健,许葵,等.输气管道裂纹动态扩展的影响因素分析[J].天然气工业,2006,26(5):122-124.
[4]帅健,张宏,王永岗,等.输气管道裂纹动态扩展及止裂技术研究进展[J].石油大学学报,2004,28(3):129-136.
[5]姜凤华,田常录.疲劳裂纹扩展的数值模拟[J].内蒙古工业大学学报(自然科学版),2004,23(3):161-162.
[6]李学峰.疲劳裂纹闭合效应数值模拟方法研究[D].西北工业大学,2005:13-15.

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备注/Memo

备注/Memo:
作者简介:于国鹏(1983-),在读硕士,主要从事油气储运安全工程方面研究。
收稿日期:2009-02-22 
更新日期/Last Update: