Simulation of ductile tearing during a full size test using a non local Gurson-Tvergaard-Needleman (GTN) model

被引：19
|
作者：
Chen, Youbin [1 ,2 ]
Lorentz, Eric [1 ]
Dahl, Anna [3 ]
Besson, Jacques [2 ]
机构：
[1] IMSIA UMR EDF ENSTA CNRS CEA 9219, 7 Blvd Gaspard Monge, F-91120 Palaiseau, France
[2] PSL Res Univ, Ctr Mat, Mines ParisTech, UMR CNRS 7633, 10 Rue Henri Desbrueres, F-91000 Evry, France
[3] MMC, Lab Renardieres, EDF R&D, Ave Renardieres, F-77250 Ecuelles, France
来源：
ENGINEERING FRACTURE MECHANICS | 2022年 / 261卷
关键词：
Non local GTN model; Ductile failure; Large scale test; CRACK-GROWTH; DAMAGE MODEL; CONSTITUTIVE-EQUATIONS; COMPUTATIONAL CELLS; VOID NUCLEATION; GRADES; FRACTURE; FAILURE; STRAIN; FORMULATION;
D O I：
10.1016/j.engfracmech.2021.108226
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Ductile tearing of a full size precracked pipe is experimentally investigated. In order to model and interpret the test, the pipe material is characterized using smooth and notched tensile bars and precracked C(T) specimens. This experimental database is used to fit the parameters of the non local Gurson-Tvergaard-Needleman (GTN) proposed in Zhang et al. (2018) and Chen et al. (2020). The model is used in finite element simulations using specific elements allowing for the control of strain/damage localization as well as volumetric locking. Mesh size independence is checked on notched tensile bars. The model is then able to represent the early stages of crack propagation in the pipe. In particular, experimentally observed crack branching is reproduced, whereas this appeared much more difficult to obtain using a local GTN model.
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页数：20
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