wnmascare
Petroleum
- May 18, 2012
- 37
Hi everyone!
I'm trying to run a high cycle fatigue analysis of a bolted flange submitted to bolt preload and a bending moment varying harmonically. The objective is to analyze only the flange, not the bolts.
The first load step is the preload and the second is the application of a bending moment of 1 kN.m. I used Abaqus to run them. The figure attached illustrates the Mises stress distribution at the end of the second load step, which accounts for the stress state generated by the preload step. The bending moment was applied at the right end of the flange.
For the fatigue analysis, I organized a spreadsheet to perform the calculation, based on the stress results of the preliminary FEA analysis. Thus, for the fatigue analysis, should I subtract the stresses of the preload step from the stresses of the bending moment step and use it for the calculation of the damage?
Any advice will be appreciate.
Thank you very much.
I'm trying to run a high cycle fatigue analysis of a bolted flange submitted to bolt preload and a bending moment varying harmonically. The objective is to analyze only the flange, not the bolts.
The first load step is the preload and the second is the application of a bending moment of 1 kN.m. I used Abaqus to run them. The figure attached illustrates the Mises stress distribution at the end of the second load step, which accounts for the stress state generated by the preload step. The bending moment was applied at the right end of the flange.
For the fatigue analysis, I organized a spreadsheet to perform the calculation, based on the stress results of the preliminary FEA analysis. Thus, for the fatigue analysis, should I subtract the stresses of the preload step from the stresses of the bending moment step and use it for the calculation of the damage?
Any advice will be appreciate.
Thank you very much.
