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Crack growth rate

Antonio Papangelo's picture

On unified crack propagation laws

The anomalous propagation of short cracks shows generally exponential fatigue crack growth but the dependence on stress range at high stress levels is not compatible with Paris’ law with exponent m=2. Indeed, some authors have shown that the standard uncracked SN curve is obtained mostly from short crack propagation, assuming that the crack size a increases with the number of cycles N as da/dN=H\Delta\sigma^h where h is close to the exponent of the Basquin’s power law SN curve.

altamimi's picture

Damage accumulation / Crack growth rate

Hi everyone, 

 

I'm trying to develop a crack growth model of two interacting, neighboring, cracks in carbon steel materials. However, I was wondering if I have to take into consideration damage accumilation as I'm doing "CRACK GROWTH RATE" not crack growth. 

 

any input is highly appreciated, 

thank you, 

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