Stress Intensity Factor for Elliptical Cracksby pbeary Tags: cracks, elliptical, factor, intensity, stress 

#1
Nov511, 11:57 AM

P: 4

Hi, I just wanted some clarification with respect to a few equations relating stress intensity factor to semielliptical and quarterelliptical cracks in solids.
The equations I have according to my notes are [itex]K_{I_{(\varphi=\frac{\pi}{2})}}=1.12\frac{\sigma \sqrt{\pi a}}{\Phi}[/itex] and [itex]K_{I_{(\varphi=0)}}=1.12\frac{\sigma \sqrt{\pi \frac{a^{2}}{c}}}{\Phi}[/itex] The problem is, from a diagram I have, it seems the first one is the quarterelliptical (corner) crack and the latter is the edge. Is this correct? I am confused as it states the semielliptical crack first then the corner crack, though you would expect the explanations to be in the same order... Here is the diagram btw. Thanks in advance! 



#2
Nov511, 01:59 PM

Admin
P: 21,637

a is the same order as a^{2}/c 



#3
Nov511, 02:52 PM

P: 4

Guess this can be closed now. 


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