Notice of Retraction: Three-dimensional numerical simulations of crack propagation with cohesive zone model

2010 ◽  
Author(s):  
Chen Shunxiang ◽  
Zhang Zhichun ◽  
Xia Wei
Keyword(s):  
Crack Propagation ◽  
Numerical Simulations ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Three Dimensional ◽  
Zone Model

scholarly journals Crack Propagation of SS304/BNi-2 Brazed Joints: Experiments and Numerical Simulations

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1031 ◽  
Author(s):  
Zhou ◽  
Jiang ◽  
Tan ◽  
Shi ◽  
Yang
Keyword(s):  
Crack Propagation ◽  
Numerical Simulations ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Zone Model ◽  
Propagation Process ◽  
Whole Process ◽  
Crack Propagation Process ◽  
Brazed Joints ◽  
Brazed Joint

The strength of brazed joints is of great significance for plate-fin heat exchangers. Although a lot of research on the strength of brazed joints has been carried out, few studies have focused on the whole process of the crack propagation of brazed joints under loading, and no accurate simulation methods have been published. In this paper, the crack propagation of SS304/BNi-2 brazed joints was investigated by both experiments and numerical simulations. The cohesive zone model (CZM) was applied to simulate the crack propagation. The cohesive energy was obtained by the T-type brazed joint peeling experiments. The cohesive strength was determined as 30 MPa by comparing the load–displacement curves from the simulations and experiments. The results showed that the crack propagation process predicted by the CZM was consistent with the experimental results. Furthermore, with the increase of displacement applied on the specimen, the rate of crack propagation of the brazed joints was high at the beginning, and then gradually slowed down in the later stages. Under displacement-controlled conditions, increasing the thickness and the yield strength of the base metal could delay the crack initiation, but it would increase the crack growth rate once the crack was initiated.

Cohesive Zone Modeling for 3D Ductile Crack Propagation

2016 ◽  
Vol 853 ◽  
pp. 132-136 ◽  
Author(s):  
Xiao Li ◽  
Huang Yuan
Keyword(s):  
Crack Propagation ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Three Dimensional ◽  
Stress Triaxiality ◽  
Cohesive Zone Modeling ◽  
Zone Model ◽  
Ductile Materials ◽  
Zone Modeling ◽  
Good Agreement

Computational modeling of three-dimensional crack propagation in very ductile materials is still a challenge in fracture mechanics analysis. In the present work a new stress-triaxiality-dependent cohesive zone model (TCZM) is proposed to describe elastic-plastic fracture process in full three-dimensional specimens. The cohesive parameters are identified as a function of the stress triaxiality from ductile fracture experiments. The predictions of TCZM show good agreement with the experimental results for both side-grooved C(T) specimen and rod bar specimen.

scholarly journals Numerical Study of the Fatigue Crack in Welded Beam-To-Column Connection Using Cohesive Zone Model

2006 ◽  
Vol 324-325 ◽  
pp. 847-850 ◽  
Author(s):  
Cedric Lequesne ◽  
A. Plumier ◽  
H. Degee ◽  
Anne Marie Habraken
Keyword(s):  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Numerical Study ◽  
Damage Model ◽  
Three Dimensional ◽  
Fatigue Behaviour ◽  
Bending Test ◽  
Zone Model ◽  
Moment Resisting Frame ◽  
Moment Resisting

The fatigue behaviour of the welded beam-to-column connections of steel moment resisting frame in seismic area must be evaluated. The cohesive zone model is an efficient solution to study such connections by finite elements. It respects the energetic conservation and avoids numerical issues. A three-dimensional cohesive zone model element has been implemented in the home made finite element code Lagamine [1]. It is coupled with the fatigue continuum damage model of Lemaître and Chaboche [2]. The cohesive parameters are identified by the inverse method applied on a three points bending test modelling.

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