Calculate the approximate critical crack sizes (ccrit) that mark the transition

Question

Calculate the approximate critical crack sizes (ccrit) that mark the transition from yield dominated behaviour to crack propagation dominated behaviour for two of the materials in the diagram below (use the coordinates of the centre of the ellipses). For these two materials discuss the significance of the critical crack size in terms of a potential or real application of each material

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Explanation / Answer

ans:
click on below link u got the ans
1)http://home.ufam.edu.br/berti/nanomateriais/0495296023MaterialsEnginee.pdf

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