TerryR1
Mechanical
- Apr 27, 2009
- 69
Anyone here familiar with 8C and or FEM 1.001?
8C references FEM for fatigue analysis method.
Problem is I'm getting an overly conservative FoS.
I have a high number of cycles (>>2m), a small portion of which is high load, the majority low load. FEM allows for this with a fatigue spectrum, but the spectrum has no effect for high cycle applications when following their formulas.
Result is the same FoS for full load for 100% of the cycles, compared to FoS for full load for 1% cycles, 10% load for 99% cycles.
I'd like to apply cumulative damage (or similar) to the FEM method. Has anyone done this? Or have any resources that would help? Thanks much.
8C references FEM for fatigue analysis method.
Problem is I'm getting an overly conservative FoS.
I have a high number of cycles (>>2m), a small portion of which is high load, the majority low load. FEM allows for this with a fatigue spectrum, but the spectrum has no effect for high cycle applications when following their formulas.
Result is the same FoS for full load for 100% of the cycles, compared to FoS for full load for 1% cycles, 10% load for 99% cycles.
I'd like to apply cumulative damage (or similar) to the FEM method. Has anyone done this? Or have any resources that would help? Thanks much.
