Effect of constraint on creep crack initiation time in test specimens in ASTM-E1457 standard

被引：25

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, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2017年 / 176卷

基金：

中国国家自然科学基金;

关键词：

Constraint; Creep crack initiation; ASTM-E1457; Specimen geometry; Side groove; MO-V STEEL; FAILURE ASSESSMENT DIAGRAM; 316H STAINLESS-STEEL; OF-PLANE CONSTRAINT; GROWTH-BEHAVIOR; UNIFIED CHARACTERIZATION; WIDE-RANGE; INPLANE; PREDICTION; PARAMETER;

D O I：

10.1016/j.engfracmech.2017.02.021

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The creep crack initiation (CCI) time of six specimen geometries in ASTM E1457 standard has been predicted by using numerical simulations, and the constraint effect on CCI time was analyzed. The results show the specimens with different geometries, size ranges and side-grooves recommended by ASTM-E1457 produce different CCI time data due to different constraint levels. With increasing constraint levels in specimens, the CCI time is reduced. The quantitative correlation formulas of CCI time with creep constraint parameters have been established, and they may be applied in CCI life assessment of high temperature components for accounting for constraint effect and improving accuracy. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：61 / 73

页数：13

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