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3 replies

AlanStevens19-Tanzanite
19-Tanzanite
April 22, 2020

You haven't defined superscript n.

 

Alan

 

PS It's usually best to upload your worksheet, not just an image.

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Werner_E
Werner_E25-Diamond I
25-Diamond I
April 22, 2020

The units in your first equation don't balance, neither if we assume n=2, nor for any other value of n.

 

The left hand side is of dimension "length", the right hand side pressure^n * length^(n/2)

 

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Fred_Kohlhepp23-Emerald I
23-Emerald I
April 22, 2020

Fatigue crack growth using Paris' parameter can be a bit of a challenge.  See if the attached can give you a place to start from.

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