Analysis of ductile fracture in damaged pipelines by a geometric parameter method

被引：8
|
作者：
Corigliano, A [1 ]
Maier, G [1 ]
Mariani, S [1 ]
机构：
[1] Politecn Milan, Dept Struct Engn, I-20133 Milan, Italy
来源：
ENGINEERING STRUCTURES | 1999年 / 21卷 / 10期
关键词：
ductile fracture; geometric parameters; pipelines;
D O I：
10.1016/S0141-0296(98)00040-6
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Numerical simulations by a geometric parameter approach of ductile fracture processes in damaged pipelines are here presented and discussed. The geometric parameters are the crack-tip-opening-displacement (CTOD) and the crack-tip-opening-angle (CTOA): following recent literature, they are assumed to govern the onset of crack propagation and the subsequent propagation phase, respectively. A simplified procedure is proposed for the identification of critical CTOA, as a function of the tip advancement. Numerical simulations of crack propagation in Three-Point-Bending Tests and in pressurised damaged pipelines are critically presented and compared with experiments and with numerical simulations based on the use of Gurson's model. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：924 / 936
页数：13
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