Stress intensity factors for three-dimensional weld toe cracks using weld toe magnification factors

2013 ◽  
Vol 37 (2) ◽  
pp. 146-156 ◽  
Author(s):  
J. W. Han ◽  
D. K. Han ◽  
S. H. Han
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Three Dimensional ◽  
Intensity Factors ◽  
Magnification Factors ◽  
Weld Toe

3D stress intensity factors for weld toe semi-elliptical surface cracks using XFEM

2016 ◽  
Vol 48 ◽  
pp. 1-14 ◽  
Author(s):  
John H.L. Pang ◽  
Kin Shun Tsang ◽  
Hsin Jen Hoh
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Surface Cracks ◽  
Intensity Factors ◽  
Weld Toe

Analysis of Surface Flaw in Pressure Vessels by a New 3-Dimensional Alternating Method

1982 ◽  
Vol 104 (4) ◽  
pp. 299-307 ◽  
Author(s):  
T. Nishioka ◽  
S. N. Atluri
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Surface Crack ◽  
Crack Surface ◽  
Pressure Vessels ◽  
Pressure Loading ◽  
Intensity Factors ◽  
Alternating Method ◽  
Magnification Factors

An alternating method, in conjunction with the finite element method and a newly developed analytical solution for an elliptical crack in an infinite solid, is used to determine stress intensity factors for semi-elliptical surface flaws in cylindrical pressure vessels. The present finite element alternating method leads to a very inexpensive procedure for routine evaluation of accurate stress intensity factors for flawed pressure vessels. The problems considered in the present paper are: (i) an outer semi-elliptical surface crack in a thick cylinder, and (ii) inner semi-elliptical surface cracks in a thin cylinder which were recommended for analysis by the ASME Boiler and Pressure Vessel Code (Section III, App. G, 1977). For each crack geometry of an inner surface crack, seven independent loadings, such as internal pressure loading on the cylinder surface and polynomial pressure loadings from constant to fifth order on the crack surface, are considered. From the analyses of these loadings, the magnification factors for the internal pressure loading and the polynomial influence functions for the polynomial crack surface loadings are determined. By the method of superposition, the magnification factors for internally pressurized cylinders are rederived by using the polynomial influence functions to check the internal consistency of the present analysis. These values agree excellently with the magnification factors obtained directly. The present results are also compared with the results available in literature.

Parametric equations for T-butt weld toe stress intensity factors

1999 ◽  
Vol 21 (10) ◽  
pp. 1051-1062 ◽  
Author(s):  
F.P. Brennan ◽  
W.D. Dover ◽  
R.F. Karé ◽  
A.K. Hellier
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Intensity Factors ◽  
Butt Weld ◽  
Weld Toe
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