Question 4 1 pts Select one or more answers for the following question: About 90

Question

Question 4 1 pts Select one or more answers for the following question: About 90% of failure in metallic structural components is due to fatigue. Consider a component made out of a material with a fatigue limit, like steel, that has demonstrated fatigue failure. Which of the approaches below would mitigate this type of failure? Replacing the component with a material that does not have a fatigue limit, like aluminum. Limiting the cyclic stress amplitude to be below the fatigue limit. Ensuring that the cyclic stress amplitude is above the fatigue limit. Polishing the component to eliminate scratches and grooves Utilizing shot-peening to introduce residual compressive stresses.

Explanation / Answer

If only one is correct then it should be utilizing shot peening to introduce residual compressive stress because  introducing residual compressive stress will increase the fatigue strength of component.

But if more than one is correct then

Also polishing the component to eliminate scratches and grooves and limiting the cyclic stress amplitude to be below the fatigue limit will mitigate this type of failure.

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