Calculate DNVGL RP C203 tubular stress amplitude and allowable cycles from axial load and bending moment.
Enter the axial load and bending moment for load state A, and load state B. The stress amplitude is the maximum difference in longitudinal stress between load state A and load state B. The longitudinal stress can be calculated for both positive bending stress (add the bending stress) and negative bending stress (subtract the bending stress). Use the user defined section option for non symmetric sections.
Tool Input
- jointtype : Joint Or Material Type
- csntype : SN Curve Type
- schdtype : Tubular Schedule Type
- diamtype : Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Wall Thickness Type
- tnu : User Defined Wall Thickness
- sectype : Cross Section Type
- Asu : User Defined Cross Section Area
- Zpu : User Defined Z Modulus Positive Bending
- Znu : User Defined Z Modulus Negative Bending (Asymmetric Section Only)
- walltype : Weld Joint Type
- tru : User Defined Reference Thickness
- kfactype : Thickness Exponent Type
- ku : User Defined Thickness Exponent
- scftype : Stress Concentration Factor Type
- SCFu : User Defined Stress Concentration Factor
- dfftype : Design Fatigue Factor Type
- DFFu : User Defined Design Fatigue Factor
- ratype : Forging Surface Roughness Type
- temptype : Temperature Derating Type
- Tu : User Defined Design Temperature
- systype : System Effect Factor Type
- Rsu : User Defined System Effect Log Factor
- mfactype : Mean Stress Factor Type
- fmu : User Defined Mean Stress Factor
- sstype : Stress Type Positive Or Negative Bending
- Fa : Axial Load
- Mb : Bending Moment
Tool Output
- Ax : Tubular Cross Section Area
- DFF : Design Fatigue Factor
- N : Allowable Number Of Cycles
- OD : Nominal Outside Diameter
- Rm : Material Thickness Derating Log Factor
- Rs : System Effect Log Factor
- Rt : Temperature Derating Log Factor
- S+ : Positive Stress Tension
- S- : Negative Stress Compression
- SCF : Stress Concentration Factor
- Saa : Axial Stress A
- Sab : Axial Stress B
- Sba : Bending Stress A
- Sbb : Bending Stress B
- Sd : Design Stress Amplitude (With fm and SCF)
- Sla : Longitudinal Stress A
- Slb : Longitudinal Stress B
- Sm : Mean Stress Amplitude (With fm)
- Sn : Nominal Stress Amplitude (|Sla - Slb|)
- Zn : Tubular Z Modulus Negative Bending
- Zp : Tubular Z Modulus Positive Bending
- fm : Mean Stress Factor
- k : Thickness Exponent
- tn : Nominal Wall Thickness
- tref : Reference Thickness