Stress intensity factors for cracks emanating from a circular hole in an infinite quasi-orthotropic plane

2018 ◽  
Vol 42 (3) ◽  
pp. 743-751 ◽  
Author(s):  
Mojtaba Hajimohamadi ◽  
Rahmatollah Ghajar
Keyword(s):  
Stress Intensity ◽  
Circular Hole ◽  
Stress Intensity Factors ◽  
Intensity Factors ◽  
Orthotropic Plane

An Empirical Formula for Stress Intensity Factors of Double Edge Half-Circular-Hole Cracks in a Rectangular Sheet in Tension

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Xiangqiao Yan
Keyword(s):  
Stress Intensity ◽  
Boundary Element Method ◽  
Circular Hole ◽  
Stress Intensity Factors ◽  
Empirical Formula ◽  
Crack Problem ◽  
Displacement Discontinuity ◽  
Displacement Discontinuity Method ◽  
Intensity Factors ◽  
Double Edge

This note deals with the stress intensity factors (SIFs) for double edge half-circular-hole cracks in a rectangular sheet in tension by means of the displacement discontinuity method with crack-tip elements (a boundary element method) proposed recently by the author. Moreover, an empirical formula of the SIFs of the crack problem is presented and examined. It is found that the empirical formula is simple, yet accurate for evaluating the SIFs of the crack problem.

Stress Intensity Factors for a Crack Emanating Non-Radially From a Circular Hole Under Arbitrary Loading

2006 ◽  
Author(s):  
Simon C. F. Sheng
Keyword(s):  
Stress Intensity ◽  
Circular Hole ◽  
Stress Intensity Factors ◽  
Structural Integrity ◽  
Plane Deformation ◽  
Elastic Solid ◽  
Dislocation Model ◽  
Mode Ii ◽  
Intensity Factors ◽  
Mode Iii

Stress intensity factors are found for a crack emanating from a circular hole in an elastic solid which is in a state of plane deformation resulting from loads applied at infinity or pressure applied internally at the faces of the crack and the hole. The results, including Mode-I (opening) and Mode-II (shearing) stress intensity factors, are obtained numerically by means of a dislocation model which conveniently allows for general loading and, consequently, can easily handle the case where a crack emanates non-radially from a hole. Good agreement is found with published values for the special case when the crack is radial and the loading consists of remote tension and uniform pressure at the surface of the hole. Also included in the present paper are results for the case when both the hole and the crack are pressurized. Although the subject elastic solid is an infinite medium, the results of this paper serve as good estimates when the hole is relatively small in a finite component and is distant from the component edge. Since in most circumstances a real crack does not orient itself radially from a hole, this paper provides analysts information to decide whether Mode-II fracture needs to be considered in assessing the structural integrity of a component with a hole. Similarly, when the problem is 3-dimensional, the results of this paper imply that Mode-III (tearing) fracture may also need to be considered.

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