Effects of side-groove depth on creep crack-tip constraint and creep crack growth rate in C(T) specimens

被引：11
|
作者：
He, J. Z. [1 ]
Wang, G. Z. [1 ]
Tu, S. T. [1 ]
Xuan, F. Z. [1 ]
机构：
[1] East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2018年 / 41卷 / 02期
基金：
中国国家自然科学基金;
关键词：
C(T) specimen; creep constraint; creep crack growth rate; finite element; side-groove; UNIFIED CHARACTERIZATION; 3-DIMENSIONAL ANALYSES; RUPTURE BEHAVIOR; P92; STEEL; PREDICTION; FRACTURE; PARAMETER; INPLANE; 316H; FIELDS;
D O I：
10.1111/ffe.12676
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of side-groove depth on creep crack-tip constraint and creep crack growth (CCG) rate in C(T) specimens have been quantitatively studied. The results indicate that with increasing side-groove depth, the constraint level and CCG rate increase and constraint distribution along crack front (specimen thickness) becomes more uniform. The constraint and CCG rate of thinner specimen are more sensitive to side-groove depth. Two new creep constraint parameters (namely R-* and A(c)) both can quantify constraint levels of the specimens with and without side-grooves, and the quantitative correlations of CCG rate with constraint have been established. The mechanism of the side-groove depth effect on the CCG rate has also been analyzed.
引用
收藏
页码：260 / 272
页数：13
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