Calculating How many load repititions can be applied before failure

[Jim4592]

Homework Statement

A metal rod having a diameter of 10 mm is subjected to a repeated tensile load. The material of the rod has a tensile strength of 290 MPa. How many load repetitions can be applied to this rod before it fails if the magnitude of the load is (a) 5 kN, and (b) 11 kN?

Homework Equations

The Attempt at a Solution

I'm really not sure how to go about setting this problem up, I was hoping someone out there could show me what I need to do first, second, etc.

I'm not looking for someone to do this for me, just looking for some advice on what I can do, or read to answer this question.

 

[nvn]

Jim4592: First, what is the fatigue strength of this material? Are you using an S-N curve? Can you post the S-N curve? Also, compute the applied tensile stress on the rod.