Question

A fatigue test is performed with a mean stress of 107 MPa and a stress amplitude of 135 MPa. Calculate the stress ratio. You will only have 1 attempt to answer this question. The answer should have 2 decimals of accuracy.

Answer 1

Answer and Explanation:

To calculate the stress ratio, we need to divide the stress amplitude by the mean stress.

Given:

Mean stress = 107 MPa

Stress amplitude = 135 MPa

To calculate the stress ratio, we can use the formula:

Stress ratio = Stress amplitude / Mean stress

Now, substituting the given values into the formula:

Stress ratio = 135 MPa / 107 MPa

Calculating this expression, we get:

Stress ratio ≈ 1.26

Therefore, the stress ratio for the fatigue test is approximately 1.26.