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.

scholarly journals An Improved Cohesive Zone Model for Interface Mixed-Mode Fractures of Railway Slab Tracks

2021 ◽  
Vol 11 (1) ◽  
pp. 456
Author(s):  
Yanglong Zhong ◽  
Liang Gao ◽  
Xiaopei Cai ◽  
Bolun An ◽  
Zhihan Zhang ◽  
...  
Keyword(s):  
Interface Crack ◽  
Cohesive Zone ◽  
Mixed Mode ◽  
Cohesive Zone Model ◽  
Complex Loading ◽  
Bending Test ◽  
Mixed Mode Fracture ◽  
Zone Model ◽  
Slab Track ◽  
Interfacial Cracks

The interface crack of a slab track is a fracture of mixed-mode that experiences a complex loading–unloading–reloading process. A reasonable simulation of the interaction between the layers of slab tracks is the key to studying the interface crack. However, the existing models of interface disease of slab track have problems, such as the stress oscillation of the crack tip and self-repairing, which do not simulate the mixed mode of interface cracks accurately. Aiming at these shortcomings, we propose an improved cohesive zone model combined with an unloading/reloading relationship based on the original Park–Paulino–Roesler (PPR) model in this paper. It is shown that the improved model guaranteed the consistency of the cohesive constitutive model and described the mixed-mode fracture better. This conclusion is based on the assessment of work-of-separation and the simulation of the mixed-mode bending test. Through the test of loading, unloading, and reloading, we observed that the improved unloading/reloading relationship effectively eliminated the issue of self-repairing and preserved all essential features. The proposed model provides a tool for the study of interface cracking mechanism of ballastless tracks and theoretical guidance for the monitoring, maintenance, and repair of layer defects, such as interfacial cracks and slab arches.

Convergence of a gradient damage model toward a cohesive zone model

2011 ◽  
Vol 339 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Eric Lorentz ◽  
S. Cuvilliez ◽  
K. Kazymyrenko
Keyword(s):  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Damage Model ◽  
Zone Model

Numerical study for cohesive zone model in delamination analysis based on higher-order B-spline functions

2017 ◽  
Vol 02 (01) ◽  
pp. 1750004 ◽  
Author(s):  
Tran Quoc Thai ◽  
Timon Rabczuk ◽  
Xiaoying Zhuang
Keyword(s):  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Numerical Study ◽  
Higher Order ◽  
Integration Scheme ◽  
Spline Functions ◽  
Zone Model ◽  
Equilibrium Path ◽  
Arc Length ◽  
B Spline

A numerical aspect of the implementation cohesive zone model for delamination analysis is presented in this work by employing interface elements and higher-order B-spline functions. The stress oscillation is addressed, and Newton–Cotes integration scheme is considered as a good candidate to overcome this phenomenon. In order to track the nonlinear equilibrium path, a general arc-length constraint named dissipation-based arc-length method is applied. A numerical example is presented to perform the ability of the formulation in predicting the delamination behavior of studied structures.

Numerical Study on the Adhesion Strength Between Ice and Aluminium Based on a Cohesive Zone Model

2014 ◽  
Author(s):  
Yong Chen ◽  
Wang Wenhao ◽  
Wei Dong ◽  
Mo Li ◽  
Lei Lei
Keyword(s):  
Adhesion Strength ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Numerical Study ◽  
Element Model ◽  
Interface Roughness ◽  
Zone Model ◽  
Ansys Software ◽  
Aircraft Accidents ◽  
Aeroengine Components

Accumulation of ice on aeroengine components could cause serious aircraft accidents. An understanding of the adhesion characteristics of ice-substrate interfaces is essential in order to design reliable anti-icing and de-icing systems. The main purpose of this paper is on the application of a bilinear cohesive zone model to simulate the interface between ice and aluminum by using ANSYS software. A finite element model which coupled with the cohesive zone model is built and some factors that affect the Al/ice tensile strength are discussed. These factors include interface roughness, initial damage of the interface, which is caused by the existence of bubbles. The adhesion strength between ice and aluminum are predicted and analyzed. This model could be used to further study on the mechanisms responsible for the non-linear relationship between the surface roughness and ice adhesion strength.

Sign in / Sign up

Export Citation Format

Share Document