Finite Element Analysis for Fatigue Crack Closure Behavior Using Reversed Plastic Zone Size

2003 ◽  
Vol 27 (10) ◽  
pp. 1703-1711 ◽  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Crack ◽  
Plastic Zone ◽  
Crack Closure ◽  
Plastic Zone Size ◽  
Zone Size ◽  
Element Analysis ◽  
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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