Crack paths in three-dimensional elastic solids. i: two-term expansion of the stress intensity factors—application to crack path stability in hydraulic fracturing

1999 ◽  
Vol 36 (1) ◽  
pp. 79-103 ◽  
Author(s):  
Jean-Baptiste Leblond
Keyword(s):  
Stress Intensity ◽  
Hydraulic Fracturing ◽  
Stress Intensity Factors ◽  
Crack Path ◽  
Three Dimensional ◽  
Intensity Factors ◽  
Elastic Solids ◽  
Path Stability ◽  
Crack Path Stability ◽  
Crack Paths

scholarly journals Three- Dimensional Simulation of Crack Propagation using Finite Element Method

2019 ◽  
Vol 9 (2) ◽  
pp. 892-897 ◽  
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Crack Growth ◽  
Stress Intensity Factors ◽  
Crack Path ◽  
Three Dimensional ◽  
Life Time ◽  
Intensity Factors ◽  
Growth Step ◽  
Finite Element Software

The 3D finite element software ANSYS Workbench software has been employed for simulation of engineering geometries which are containing a pre-cracks and holes. The new feature in this software is using the smart crack growth procedure and the mesh smoothing technique which provides an adaptive and smooth mesh around the crack path as well as the higher stresses area. Under the assumption of LEFM, the stress intensity factors was used as a crack growth criterion which provided as indicators of failure compared to the fracture toughness or threshold stress intensity factors (SIFs) in both static and dynamic loading respectively. The stress intensity factors were calculated for every crack growth step and the fatigue life time was predicted according to the number of cycles. The effect of the nominal notch position of the crack was illustrated. Simulations performed with Ansys show an identical crack path on structures that is in line with that of the experimental and numerical results performed by other researchers.

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