using the fatigue plot shown below choose the best material

using the fatigue plot shown below. choose the best material for an application where the loading conditions are represented by the point \"I\". Explain why that choice was chosen.

Solution

Following figure shows the S n curve

Since the operating point I is below the endurance limit of material B so it should be choosen

Material A has no endurance value and C has endurance value lower than required so its not safe to be chosen