Simulation of ductile fracture of zirconium alloys based on triaxiality dependent cohesive zone model

2021 ◽  
Author(s):  
C. Fang ◽  
X. Guo ◽  
G. J. Weng ◽  
J. H. Li ◽  
G. Chen
Keyword(s):  
Ductile Fracture ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Zirconium Alloys ◽  
Zone Model

Verification of a Cohesive Zone Model for Ductile Fracture

1996 ◽  
Vol 118 (2) ◽  
pp. 192-200 ◽  
Author(s):  
Huang Yuan ◽  
Guoyu Lin ◽  
Alfred Cornec
Keyword(s):  
Ductile Fracture ◽  
Crack Growth ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Normal Modes ◽  
Stable Crack Growth ◽  
Small Region ◽  
Zone Model ◽  
Cohesive Law ◽  
Ductile Crack Growth

In the present paper, ductile crack growth in an aluminium alloy is numerically simulated using a cohesive zone model under both plane stress and plane strain conditions for two different fracture types, shear and normal modes. The cohesive law for ductile fracture consists of two parts—a specific material’s separation traction and energy. Both are assumed to be constant during ductile fracture (stable crack growth). In order to verify the assumed cohesive law to be suitable for ductile fracture processes, experimental records are used as control curves for the numerical simulations. For a constant separation traction, determined experimentally from tension test data, the corresponding cohesive energy was determined by finite element calculations. It is confirmed that the cohesive zone model can be used to characterize a single ductile fracture mode and is roughly independent of stable crack extention. Both the cohesive traction and the cohesive fracture energy should be material specific parameters. The extension of the cohesive zone is restricted to a very small region near the crack tip and is in the order of the physical fracture process. Based on the present observations, the cohesive zone model is a promising criterion to characterize ductile fracture.

A study on ductile fracture of coiled tubing based on cohesive zone model

2019 ◽  
Vol 209 ◽  
pp. 260-273 ◽  
Author(s):  
Guanghui Zhao ◽  
Ju Li ◽  
Y.X. Zhang ◽  
Jijia Zhong ◽  
Zheng Liang ◽  
...  
Keyword(s):  
Ductile Fracture ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Zone Model ◽  
Coiled Tubing

Physics Based Formulation of a Cohesive Zone Model for Ductile Fracture

2015 ◽  
Vol 651-653 ◽  
pp. 993-999 ◽  
Author(s):  
Tuncay Yalcinkaya ◽  
Alan Cocks
Keyword(s):  
Ductile Fracture ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Volume Element ◽  
Cohesive Zone Modeling ◽  
Mode I ◽  
Zone Model ◽  
Metallic Materials ◽  
Bound Solution ◽  
Zone Modeling

This paper addresses a physics based derivation of mode-I and mode-II traction separation relations in the context of cohesive zone modeling of ductile fracture of metallic materials. The formulation is based on the growth of an array of pores idealized as cylinders which are considered as therepresentative volume elements. An upper bound solution is applied for the deformation of the representative volume element and different traction-separation relations are obtained through different assumptions.

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