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Fracture Mechanics - Residual Strength

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enachicago

Aerospace
Joined
Feb 3, 2025
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9
Hello,

I was reading dta guidelines about small antenna installation on top of the fuselage from Patrick Safarian and ı came across a problem and ı couldn't solve it. Can you help me about this?

"If deltaP=8.9 psi, fuselage Radius=128", pitch(spacing)=1.2", hole diameter=0.188", t=0.062", Ka=130 Ksi*in^0.5, Ftu=62 ksi and Fty=42 ksi show that the critical crack length is 0.242"?

View attachment 5434
 
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