scholarly journals Three-dimensional Analysis of Fatigue Crack Propagation using X-Ray Tomography, Digital Volume Correlation and Extended Finite Element Simulations

2012 ◽  
Vol 4 ◽  
pp. 151-158 ◽  
Author(s):  
Julien Réthoré ◽  
Nathalie Limodin ◽  
Jean-Yves Buffière ◽  
Stéphane Roux ◽  
François Hild
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Dimensional Analysis ◽  
Fatigue Crack Propagation ◽  
Three Dimensional ◽  
Finite Element Simulations ◽  
Digital Volume Correlation ◽  
Extended Finite Element ◽  
X Ray

Three-Dimensional Characterization of Fatigue Crack Propagation Behavior in an Aluminum Alloy Using High Resolution X-Ray Microtomography

2010 ◽  
Vol 638-642 ◽  
pp. 378-383 ◽  
Author(s):  
Hui Zhang ◽  
Peng Cheng Qu ◽  
Yuuji Sakaguchi ◽  
Hiroyuki Toda ◽  
Masakazu Kobayashi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Growth ◽  
Fatigue Crack Propagation ◽  
Three Dimensional ◽  
X Ray ◽  
Fatigue Crack Propagation Behavior ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

Synchrotron X-ray microtomography was used to investigate the three-dimensional fatigue crack propagation behavior of an aluminum alloy. Local crack growth rates along specimen thickness were calculated. Crack observation revealed that crack propagation was retarded in three regions where there exist overlapping crack segments. Crack growth retardation was found to occur in these crack overlapping regions due to stress shielding. Observation of crack propagation process indicated that one of the overlapping crack segments initiated from the twisted crack. Crack tip opening displacement was measured and it was found that crack opening was larger in single planar crack region than that in crack overlapping region.

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