Question: Consider an atomically sharp crack that has propagated 1 cm into a wide metal beam. A 100 MPa tensile stress is applied normal to

Consider an atomically sharp crack that has propagated 1 cm into a wide metal beam. A 100 MPa tensile stress is applied normal to the crack surface. a) Calculate the stress at the crack tip in MPa, listing any assumptions used. b) Explain how the ductility of the metal affects the likelihood of crack propagation. c) If a 2 mm diameter hole is drilled at the crack tip, by how much does the stress at the crack tip change? Does the stress increase or decrease?

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