The role of interfaces and matrix void nucleation mechanism on the ductile fracture process of discontinuous fibre-reinforced composites

1994 ◽  
Vol 29 (11) ◽  
pp. 2893-2902 ◽  
Author(s):  
S. B. Biner
Keyword(s):  
Ductile Fracture ◽  
Fracture Process ◽  
Void Nucleation ◽  
Nucleation Mechanism ◽  
Reinforced Composites ◽  
Fibre Reinforced Composites ◽  
Ductile Fracture Process

scholarly journals An overview of application of micromechanical models in ductile fracture analysis of welded joints

2020 ◽  
Vol 47 (1) ◽  
pp. 33-62
Author(s):  
M. Rakin ◽  
B. Medjo ◽  
N. Gubeljak ◽  
A. Sedmak
Keyword(s):  
Ductile Fracture ◽  
Welded Joints ◽  
Void Nucleation ◽  
Base Material ◽  
Damage Parameter ◽  
Damage Development ◽  
Long Time ◽  
Actual Material ◽  
Micromechanical Models

Fracture of welded joints has been an important research and industrial topic for a long time, having in mind the key role of welded joints in ensuring the safe operation and integrity of welded structures. This work contains an overview of application of micromechanical models to ductile fracture of welded joints. The main benefit of these models, in comparison with the classical fracture mechanics approach, is consideration of the local quantities (stress and strain) in prediction of damage development. The damage is quantified through the value of the damage parameter, which is typically related to the void nucleation, growth and coalescence for ductile fracture of metallic materials, i.e. the description of the material can be related to the actual material behaviour during fracture. Most of the presented studies, including those published by the present authors, are performed on steel as the base material, and the rest deal with aluminium alloys.

Interaction Effect Evaluation of Plural Surface Cracks in Ductile Fracture Process

2012 ◽  
Author(s):  
Kazuhiro Suga ◽  
Katsumasa Miyazaki ◽  
Ryotaro Senda ◽  
Masanori Kikuchi
Keyword(s):  
Ductile Fracture ◽  
Fracture Process ◽  
Crack Depth ◽  
Maximum Load ◽  
Crack Penetration ◽  
Crack Problems ◽  
Average Crack ◽  
Fracture Processes ◽  
Ductile Fracture Process ◽  
Effect Of Surface

Effect of surface flaw on ductile fracture behavior of non-aligned multiple flaws in plate is studied numerically using Gurson’s constitutive equation. Based on experiments, two parallel non-aligned crack problems are simulated. From experimental and simulation data, crack coalescence, interaction between two cracks and crack penetration was observed. In all cases, ductile fracture processes are obtained and results are compared with experimental ones. Fracture patterns agree well with experimental results. Close qualitative match was obtained by comparing each load displacement curves that are normalized by maximum load. It shows that the mechanism of ductile fracture process is properly captured. By selecting one normalized experimental data as a base setup, maximum load from related simulation results can be predicted. Aligned rules are checked based on these simulations, and H / a criteria verified it’s availability when average crack depth is used as crack depth.

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