Hybrid speckle/finite element technique for determining crack tip stress intensity factors

1988 ◽  
Vol 4 (1) ◽  
pp. 43-49
Author(s):  
Gene E. Maddux
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Crack Tip ◽  
Intensity Factors ◽  
Finite Element Technique ◽  
Element Technique ◽  
Crack Tip Stress

Calculation of Mixed Mode Fracture Stress Intensity Factors in an Orthotropic Plate Using Finite Element Technique

1986 ◽  
Vol 108 (3) ◽  
pp. 282-287 ◽  
Author(s):  
A. Hurlbut ◽  
F. T. C. Loo
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Current Approach ◽  
Mixed Mode Fracture ◽  
Intensity Factors ◽  
Orthotropic Plates ◽  
Finite Element Technique ◽  
Practical Engineering ◽  
Element Technique

A finite element technique using the eight-node quadrilateral isoparametric element is presented to calculate stress intensity factors in orthotropic plates. The procedure is general so as to include multilayered laminates with varying laminae directions and thicknesses. This method can easily solve problems with various loading conditions and plate geometry. Several examples with solutions available in literature are solved to examine the accuracy of the current approach. Solutions of more complicated and practical engineering fracture problems are also presented to demonstrate the versatility of this method.

Finite element analysis of cracked bodies to determine stress intensity factors

1976 ◽  
Vol 11 (1) ◽  
pp. 18-25 ◽  
Author(s):  
C L Chow ◽  
K J Lau
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Crack Tip ◽  
Stress Conditions ◽  
Intensity Factors ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Crack Tip Stress

A method for the computation of the stress intensity and associated geometrical correction factors by use of the finite element analysis is presented. The lack of ability to represent crack tip stress conditions has been the shortcoming of the conventinal techniques in finite-element solutions of problems of cracked bodies. The proposed method provides the representation of crack tip stress conditions with elliptic displacement functions which lead to the direct computation of stress intensity factors. The method is applied to several crack configurations with relatively coarse finite-element networks and the accuracy is found to be satisfactory when compared with results of previous workers.

Crack tip stress intensity factors for a crack emanating from a semi-infinite notch with application to the avoidance of fatigue in complete contacts

2008 ◽  
Vol 223 (4) ◽  
pp. 789-794 ◽  
Author(s):  
A G Philipps ◽  
S Karuppanan ◽  
N Banerjee ◽  
D A Hills
Keyword(s):  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Crack Tip ◽  
Crack Development ◽  
Short Crack ◽  
Length Scale ◽  
Intensity Factors ◽  
Reference Length ◽  
Complete Contact ◽  
Crack Tip Stress

Crack tip stress intensity factors are found for the problem of a short crack adjacent to the apex of a notch, and lying perpendicular to one of the notch faces. Loading is represented by the two Williams eigensolutions, the ratio between which provides a reference length scale and permits a comprehensive display of the solution. The results are applied to the problem of a crack starting from the edge of a notionally adhered complete contact, and conditions for the avoidance of crack development are found.

scholarly journals Analysis of cracked plate membrane problem using Metis finite element model

2002 ◽  
Vol 24 (4) ◽  
pp. 249-256
Author(s):  
Nguyen Dang Hung ◽  
Tran Thanh Ngoc
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Element Model ◽  
Intensity Factors ◽  
Isoparametric Element ◽  
Cracked Plate ◽  
Membrane Problem ◽  
Element Technique

A conformable and convergent finite element technique is presented for calculation of stress intensity factors for cracked plate membrane problem, which is based on the formulation of the hybrid displacement finite element method, named "Metis elements". In order to achieve a high convergence, this element is combined with an isoparametric element of Barsoum, in which,  the mid-side nodes are moved to quarter-point position. Many examples are numerically tested for evaluation this model, show that the element HSM has a good performance for calculation of stress intensity factors.

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