Evaluation of constraint effects on creep crack growth by experimental investigation and numerical simulation

被引：66
|
作者：
Zhao, Lei
Jing, Hongyang
Xu, Lianyong [1 ]
Han, Yongdian
Xiu, Junjie
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2012年 / 96卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Creep crack growth; Crack depth; Constraint; Parameter Q; Two parameter approach; PLASTIC FRACTURE-MECHANICS; HARDENING MATERIAL; TIP FIELDS; P92; STEEL; PREDICTION; PARAMETER; DEFORMATION; TEMPERATURE; SPECIMENS; BEHAVIOR;
D O I：
10.1016/j.engfracmech.2012.08.009
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Effects of constraint induced by crack depth on creep crack behavior of P92 steel was investigated by experimental investigation and numerical simulation. Creep crack growth tests were carried out on compact tension specimens with different crack depths. It revealed that the high constraint affected creep crack initiation time and steady creep crack growth rate. Then, the crack-opening stress distribution at crack tip during creep crack growth process was obtained by finite element method (FEM) analysis. The corresponding variation of constraint parameter Q was also obtained. Finally, a C*-Q approach was employed to characterize the creep crack growth rate. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：251 / 266
页数：16
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