1. Explain what is meant by the term fast fracture, stating its causes, and give two examples from which it might occur. 2. Briefly describe, with the aid of a sketch in each case, the appearance of a fracture surface that has undergone (i) ductile tearing and (ii) cleavage. 3. Explain, with the aid of a diagram, how a crack propagates by ductile tearing within the plastic zone of an engineering metal. 4. Explain, with the aid of diagrams, how crack propagation is affected by the presence of the fibers in glass fibre reinforced resins. 5. With the aid of a sketch, describe and explain the fracture surface characteristics of a metal component that has undergone fatigue failure. 6. By referring to graphical representations of fatigue test results, explain the terms S-N curve, Fatigue Limit and Endurance Limit. Please answer all parts
1. Explain what is meant by the term fast fracture, stating its causes, and give two examples from which it might occur.
2. Briefly describe, with the aid of a sketch in each case, the appearance of a fracture surface that has undergone (i) ductile tearing and (ii) cleavage.
3. Explain, with the aid of a diagram, how a crack propagates by ductile tearing within the plastic zone of an engineering metal.
4. Explain, with the aid of diagrams, how crack propagation is affected by the presence of the fibers in glass fibre reinforced resins.
5. With the aid of a sketch, describe and explain the fracture surface characteristics of a metal component that has undergone fatigue failure.
6. By referring to graphical representations of fatigue test results, explain the terms S-N curve, Fatigue Limit and Endurance Limit.
Please answer all parts
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