A creep stress intensity factor approach to creep-fatigue crack growth

被引：60
|
作者：
Shlyannikov, V. N. [1 ]
Tumanov, A. V. [1 ]
Boychenko, N. V. [1 ]
机构：
[1] Russian Acad Sci, Kazan Sci Ctr, Moscow 117901, Russia
来源：
ENGINEERING FRACTURE MECHANICS | 2015年 / 142卷
基金：
俄罗斯科学基金会;
关键词：
Creep-fatigue crack growth rate; Creep stress intensity factor; In-plane and out-of-plane constraint effects; OF-PLANE CONSTRAINT; TIP FIELDS; BEHAVIOR; PARAMETERS; MODEL;
D O I：
10.1016/j.engfracmech.2015.05.056
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A new parameter for characterization of the crack growth resistance for power plant materials and structures under elevated temperature is introduced in the form of creep stress intensity factor. On this base a crack growth rate approach is developed for the case of creep and fatigue interaction. A numerical method is proposed for estimating the governing parameter of the creep crack tip field in the form of an I-n-integral along the through-the-thickness straight and curved crack fronts. The application of the introduced parameters through experimental study of the creep-fatigue crack growth rate confirms effectiveness of the proposed approach. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：201 / 219
页数：19
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