Q1. Most implants in the body go through repeated cycles and may result in failure. Heart valves made of pyrolytic graphite, Cobalt chrome alloy for hip and knee replacements, dental alloys are some examples. The human heart beats about 4107 cycles per year. 1. To design the valve to last for 25 years using the high cycle fatigue approach, how many cycles should you run to qualify the valve for implant? Hint: 1Hz is equal to 1 cycle per second. 2. No disrespect to Surgeons; they are extremely skilled and careful! However, considering that the scalpel is extremely sharp, there is a probability (may be very low) of accidently. introducing a small "nick" in the valve. In such a situation which appropach would be better to predict of the life of the valve. HCF or a Damage Tolerance Appruach? 3. What will be the sources of scatter in the data for HCF design and damage tolerance design? Show the HCF and da/dn vs. K scatter in the data by drawing Figures