Unified correlation of in-plane and out-of-plane constraints with cleavage fracture toughness

被引：33
|
作者：
Mu, M. Y. [1 ]
Wang, G. Z. [1 ]
Xuan, F. Z. [1 ]
Tu, S. T. [1 ]
机构：
[1] E China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2015年 / 80卷
基金：
中国国家自然科学基金;
关键词：
In-plane constraint; Out-of-plane constraint; Cleavage fracture toughness; Unified correlation; Equivalent plastic strain; CRACK BORDER FIELD; TIP CONSTRAINT; PART II; TRANSITION; PARAMETERS; SPECIMENS; FORMULATION; TENSION;
D O I：
10.1016/j.tafmec.2015.10.005
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Extensive three-dimensional finite element analyses have been conducted for a large amount of experimental specimens with a wide range of in-plane and out-of-plane constraints. The capability of the new constraint parameter A(p) for establishing a unified correlation of in-plane and out-of-plane constraints with cleavage fracture toughness of a reactor vessel steel were comparatively investigated with the conventional constraint parameters Q and T-stress. The results show that the parameter Ap can characterize both in-plane and out-of-plane constraints and their interaction. Based on the parameter Ap, the unified correlation of a wide range of in-plane and out-of-plane constraints with cleavage fracture toughness of the steel has been obtained. In structural integrity analyses based on fracture mechanics incorporating constraint effects for improving accuracy, the unified correlation may be used to determine constraint-dependent or structurally relevant fracture toughness of specimens or cracked components with a wide range of in-plane and out-of-plane constraint levels. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：121 / 132
页数：12
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