![During a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of +140 MPa, and a minimum stress of −70 MPa](https://www.gkseries.com/blog/wp-content/uploads/2023/08/During-a-high-cycle-fatigue-test-a-metallic-specimen-is-subjected-to-cyclic-loading-with-a-mean-stress-of-140-MPa-and-a-minimum-stress-of-−70-MPa.jpg)
Q. During a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of +140 MPa, and a minimum stress of −70 MPa. The R-ratio (minimum stress to maximum stress) for this cyclic loading is
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Screenshot-653.png)
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Screenshot-654.png)
Q. During a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of +140 MPa, and a minimum stress of −70 MPa. The R-ratio (minimum stress to maximum stress) for this cyclic loading is
Sol:
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