Physics, asked by Tanyav8367, 1 year ago

Describe stages in crack growth.

Answers

Answered by Anonymous
3

Crack usually initiate at some point of stress concentration

--- common areas include scratches, fillets, threads, and dents.

Propagation occurs in two stages:

Stage-1:

            Propagates very slowly along crystallographic planes of higher shear stress and may constitute either a large or small fraction of the fatigue life of a specimen.

Stage-2:

            The crack growth rate increases and changes direction, moving perpendicular to the applied stress.

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