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Calculate the number of cycles to failure (Nf) of an aluminum alloy exposed to reverse tensile-compressive...

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Mechanical Engineering

Calculate the number of cycles to failure (Nf) of an aluminumalloy exposed to reverse tensile-compressive loading (N) with astress amplitude of 150MPa.   A = 2x10^-12.   n= 2.5m.

If initially the length (ao) of the largest crack is 0.75mm andthe fracture toughness (Kc) = 35MPA m1/2.   

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