Reply To: Problems with fatigue calculations

[javat33489]

Colleagues.

I figured out one question regarding "1. The cumulative damage ratio is too high". The problem was in the material, I specified the compressive strength and removed the tangential modulus, because... it is unknown and the value was tested in detail.

 

But problems 2 and 3 remain:

2.Expected Fatigue Life - too small.

3.Expected fatigue cycles are generally empty.

 

 

 

Why is Expected Fatigue Life so small? Tungsten carbide is a very durable material. Compressive strength 6 GPa. The maximum stress according to calculations (d3plot) is 1 GPa.

There are no Expected fatigue cycles at all, why? Am I missing something?

Please, help.