Fatigue crack closure of a corner crack: A comparison of experimental results with finite element predictions

2005 ◽  
Vol 27 (8) ◽  
pp. 914-919 ◽  
Author(s):  
S SIMANDJUNTAK ◽  
H ALIZADEH ◽  
M PAVIER ◽  
D SMITH
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Crack Closure ◽  
Experimental Results ◽  
Corner Crack ◽  
Fatigue Crack Closure

Techniques for Experimental Measurement of Fatigue Crack Closure

2007 ◽  
Vol 7-8 ◽  
pp. 3-9 ◽  
Author(s):  
David Nowell
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Closure ◽  
Experimental Measurement ◽  
Moiré Interferometry ◽  
Experimental Results ◽  
Moire Interferometry ◽  
Fatigue Crack Closure ◽  
Closure Models ◽  
Important Phenomenon

Fatigue crack closure is an important phenomenon which needs to be taken into account in the development of models for crack propagation. This paper presents an overview of techniques for measuring crack closure. The moiré interferometry approach is described in more detail and some experimental results are presented and compared with the predictions of closure models.

Experimental results on fatigue crack closure for two aluminum alloys

1979 ◽  
Vol 12 (2) ◽  
pp. 231-240 ◽  
Author(s):  
Jose A. Vazquez ◽  
Augusto Morrone ◽  
Hugo Ernst
Keyword(s):  
Fatigue Crack ◽  
Aluminum Alloys ◽  
Crack Closure ◽  
Experimental Results ◽  
Fatigue Crack Closure

Plastic Zone Study by Means of Tri-Dimensional Finite Element Models on Fatigue Crack Closure

2006 ◽  
Vol 324-325 ◽  
pp. 555-558 ◽  
Author(s):  
Antonio González-Herrera ◽  
J. Garcia-Manrique ◽  
A. Cordero ◽  
Jose Zapatero
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Plastic Zone ◽  
Crack Closure ◽  
Plastic Zone Size ◽  
Important Change ◽  
Element Analysis ◽  
Fatigue Crack Closure ◽  
Fine Mesh ◽  
Dimensional Finite Element

This paper focuses on the study of the plastic zone in fatigue crack closure based on the results obtained by means of 3D Finite Element Analysis (FEA). These results show the crack behavior through the thickness. The plastic zone is visualized and quantified. It does not correspond to the classical shape. The plastic zone in the interior surface is similar to those obtained in 2D plane strain conditions and a reduced effect of closure is observed. However, close to the external surface, 2D plane stress results are not reproduced, the plastic zone size is smaller and an important change is observed. This transition is developed in a thin external portion of the specimen and it can only be captured if a fine mesh of the thickness is done.

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