The numerical evaluation of a class of generalized stress intensity factors by use of the Lobatto-Jacobi numerical integration rule

1978 ◽  
Vol 14 (5) ◽  
pp. 469-484 ◽  
Author(s):  
N. I. Ioakimidis ◽  
P. S. Theocaris
Keyword(s):  
Stress Intensity ◽  
Numerical Integration ◽  
Stress Intensity Factors ◽  
Numerical Evaluation ◽  
Intensity Factors ◽  
Integration Rule ◽  
Generalized Stress Intensity Factors

Experimental and Numerical Evaluation of Crack Arresting Capability Due to a Dimple

2005 ◽  
Vol 127 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Toshihiko Nishimura
Keyword(s):  
Fatigue Life ◽  
Stress Intensity ◽  
Stress Intensity Factors ◽  
Numerical Evaluation ◽  
Crack Tip ◽  
Crack Arrest ◽  
Intensity Factors ◽  
Guiding Principle

Crack arresting capability is experimentally examined using center cracked tension specimens and varying the placement of the dimple ahead of the crack tip. It is confirmed that the dimple gives a greater crack arrest effect than that of the stop hole method. Next, the fatigue life of smooth specimens is compared, both with and without dimples. It is indicated that the dimple has a benefit only to the repair case after the crack is initiated. Finally, stress intensity factors of a crack due to a dimple are numerically evaluated, and a guiding principle is clarified for placing dimples.

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