(i) Consider a structural steel with yield stress y = 350 M Pa. Estimate the specimen...

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(i) Consider a structural steel with yield stress y = 350 M Pa. Estimate the specimen dimensions required for a valid K test; i.e. a. W and the maximum thickness B. Assume that the test specimen is a Single-edge notched bend (SENB) specimen, and that the typical fracture toughness value for this kind of material is known to be around K = 300 M Pa m.5. a = W = B = m Answer: m (3 marks for each correct answer) m (ii) Name the only fracture mechanism which does not occur in a brittle fracture? (2 marks) Answer: (iii) Which fracture mechanism does the following micrograph illustrate? (2 marks) 10 m (i) Consider a structural steel with yield stress y = 350 M Pa. Estimate the specimen dimensions required for a valid K test; i.e. a. W and the maximum thickness B. Assume that the test specimen is a Single-edge notched bend (SENB) specimen, and that the typical fracture toughness value for this kind of material is known to be around K = 300 M Pa m.5. a = W = B = m Answer: m (3 marks for each correct answer) m (ii) Name the only fracture mechanism which does not occur in a brittle fracture? (2 marks) Answer: (iii) Which fracture mechanism does the following micrograph illustrate? (2 marks) 10 m