scholarly journals Stress Intensity Factors for Inclined External Surface Cracks in Pressurized Pipes

◽  
2016 ◽  
Author(s):  
Guoyang Fu ◽  
◽  
Chun-Qing Li ◽  
Wei Yang ◽  
Sujeeva Setunge ◽  
...  
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
External Surface ◽  
Surface Cracks ◽  
Intensity Factors

Stress Intensity Factors for High Aspect Ratio Semi-Elliptical External Surface Cracks in Cylindrical Vessels

2014 ◽  
Vol 986-987 ◽  
pp. 882-886
Author(s):  
Hong Yu Qi ◽  
Peng Chao Guo
Keyword(s):  
Stress Intensity ◽  
Aspect Ratio ◽  
Stress Intensity Factors ◽  
High Aspect Ratio ◽  
External Surface ◽  
Superposition Principle ◽  
Three Dimensional ◽  
Surface Cracks ◽  
Intensity Factors ◽  
Aspect Ratios

External surface cracks can occur in cylindrical vessels due to damage and propagate in the manufacturing process and during service life. Most of research focuses on stress intensity factors for surface cracks with low aspect ratios, i.e., a/c ≤1.0. Situation may well arise where the aspect ratio of cracks is larger than one. An external longitudinal surface crack is assumed to be subjected to different types of hoop stress distributions acting perpendicular to the crack faces. The stress intensity factors (SIFs) along the crack front were determined through the three-dimensional finite element method. Then these results are used to compute approximate values of SIFs in the case of complex loadings by employing both the superposition principle and the power series expansions of the actual hoop stresses. It is found that the maximum stress intensity factor for external surface cracks with high aspect ratio occurs at different point to that with low aspect ratio.

Stress intensity factors for surface cracks at countersunk holes

2006 ◽  
Vol 73 (13) ◽  
pp. 1878-1898 ◽  
Author(s):  
Chul Young Park ◽  
Alten F. Grandt ◽  
Jung Jun Suh
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Surface Cracks ◽  
Intensity Factors
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