Elliptical Hole-Crack Problems in an Infinite Plate Subjected to Internal Pressure

2012 ◽  
Vol 40 (4) ◽  
pp. 104329
Author(s):  
Xiangqiao Yan ◽  
Chengqing Miao
Keyword(s):  
Internal Pressure ◽  
Infinite Plate ◽  
Elliptical Hole ◽  
Crack Problems

Hole Crack Problems in Infinite Plate Subjected to Uniform Internal Pressure

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Xiangqiao Yan ◽  
Baoliang Liu
Keyword(s):  
Internal Pressure ◽  
Crack Problem ◽  
Infinite Plate ◽  
Elliptical Hole ◽  
Displacement Discontinuity ◽  
Intensity Factors ◽  
Center Crack ◽  
Crack Problems ◽  
Amplifying Effect ◽  
Hole Geometry

This brief deals with crack(s) emanating from a hole in infinite plate subjected to uniform internal pressure. Such a crack problem is called a hole crack problem for short. By using a hybrid displacement discontinuity method (a boundary element method) proposed recently by Yan, three hole crack problems (an elliptical hole crack problem, a rhombus hole crack problem, and a triangle hole crack problem) in infinite plate subjected to uniform internal pressure are analyzed in detail. By changing hole geometry form and hole geometry parameters and by comparing the stress intensity factors (SIFs) of the hole crack problem with those of the center crack problem, the effect of the hole geometry form and hole geometry parameters on the SIFs is revealed. It is found that a hole has a shielding and an amplifying effect on the SIFs of crack(s) emanating from the hole. The shielding and amplifying effects are varied with hole geometry form and hole geometry parameters.

Hole Crack Problems in Infinite Elastic Plate in Tension

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Xiangqiao Yan ◽  
Baoliang Liu
Keyword(s):  
Elastic Plate ◽  
Homogeneous Problem ◽  
Crack Problem ◽  
Infinite Plate ◽  
Elliptical Hole ◽  
Numerical Approach ◽  
Displacement Discontinuity ◽  
Center Crack ◽  
Crack Problems ◽  
Hole Geometry

This paper deals with crack(s) emanating from a hole in infinite elastic plate in tension. Such a crack problem is called a hole crack problem for short. By extending Buckner’s principle suited for a crack to a hole crack problem in infinite plate in tension, here, the original problem (the hole crack problem in infinite plate in tension) is divided into a homogeneous problem (the one without hole crack) subjected to remote loads and a hole crack problem in an unloaded body with applied tractions on the surfaces of the hole and crack. Thus, the results in terms of the stress intensity factors (SIFs) can be obtained by considering the latter problem, which is analyzed easily by means of a hybrid displacement discontinuity (a boundary element method) proposed recently by Yan. Numerical examples are included to illustrate that the numerical approach is very simple and effective for analyzing the hole crack problem in infinite plate in tension. By using the proposed approach, three hole crack problems (i.e., a pair of cracks emanating from an elliptical hole, a pair of cracks emanating from a rhombus hole, and a crack emanating from a triangular hole in infinite plate in tension) are analyzed in detail. By changing the hole geometry form and the hole geometry parameters and by comparing the SIFs of the hole crack problem with those of the center crack problem, the effect of the hole geometry form and the hole geometry parameters on the SIFs is revealed. It is found that a hole has a shielding and an amplifying effect on the SIFs of crack(s) emanating from the hole. The shielding and amplifying effects varied with the hole geometry form and the hole geometry parameters.

Simulating isochromatics in the vicinity of crack tip using an infinite plate with a thin single elliptical hole

1997 ◽  
Author(s):  
Wellington A. Soares ◽  
Geraldo de Paula Martins ◽  
Arnaldo H. Paes de Andrade ◽  
Leonardo B. Godefroid
Keyword(s):  
Infinite Plate ◽  
Crack Tip ◽  
Elliptical Hole
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