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CALCULATOR MODULE : DNVGL RP C203 Fatigue ±
Calculate DNVGL-RP-C203 fatigue allowable number of cyles from stress amplitude, or allowable stress amplitude from number of cycles. The calculated SN curves include reduction factors for temperature, thickness, and system effects. The stress concentration factor is in addition to the embedded SCF factors. A user defined SCf is often used with a base curve with embedded SCF = 1, such as curve D. The design fatigue factor (DFF) can be used to account for accessibility and other risk factors. The DFF is applied to the number of cycles, and shifts the apparent SN curve to the left. Use the Result Plot option to display the selected SN curve. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Pipeline Fatigue Stress ±
Calculate DNVGL-RP-C203 pipeline allowable number of fatigue cycles. The stress amplitude is calculated between load state A, and load state B. Use the mean stress factor for base material and welds with insignificant residual stress. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Simplified Fatigue Damage ±
Calculate DNVGL RP C203 fatigue damage using the simplified method (DNVGL-RP-C203 section 5.1). The fatigue stress amplitude is modelled by a two parameter Weibull distribution. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Fatigue Stress Limit ±
Calculate DNVGL-RP-C203 fatigue stress limit. The fatigue limit is only applicable to SN curves in air, and CP protected in seawater. Reduction factors are applied for temperature, thickness, system effects, and design fatigue factor (DFF). Use the Result Table option to display the SN curve parameters for the selected SN curve type. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Accumulated Fatigue Damage Miner's Law ±
Calculate DNVGL-RP-C203 accumulated fatigue from stress versus number of cycles blocks. Cumulative fatigue damage is calculated using Miner's law. The stress data should be separated into "blocks". Enter the stress blocks as comma or tabl separated pairs (S, N), with each pair on a new line. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Fatigue Stress Concentration Factor ±
Calculate DNVGL-RP-C203 stress concentration factor (SCF). The SCF accounts for local hot spots caused by geometry or other factors. Some of the SN curves contain an embedded stress concentration factor. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Fatigue Stress Amplitude ±
Calculate DNVGL-RP-C203 longitudinal stress from bending moment and axial load. The stress amplitude is the stress range between the load states (eg operating and shut down). Both the positive bending and negative bending should be checked. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Fatigue System Effect ±
Calculate DNVGL-RP-C203 system effect factor. The system effect factor accounts for uncertainties where a number of identical joints are being checked (for example an anchor chain). Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Mean Stress Factor ±
Calculate DNVGL-RP-C203 mean stress factor for materials with insignificant residual stress. A stress reduction factor can be applied when the stress range is partly or wholly compressive. The reduction factor is not valid if there are significant residual stresses. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Tubular Fatigue Stress ±
Calculate DNVGL-RP-C203 allowable number of fatigue cycles for round tubulars. The stress amplitude is calculated between load state A, and load state B. Use the mean stress factor for base material and welds with insignificant residual stress. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Flat Plate Fatigue Stress ±
Calculate DNVGL-RP-C203 allowable number of fatigue cycles for flat plates. The stress amplitude is calculated between load state A, and load state B. Use the mean stress factor for base material and welds with insignificant residual stress. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |
CALCULATOR MODULE : DNVGL RP C203 Bolt Fatigue Stress ±
Calculate DNVGL-RP-C203 allowable number of fatigue cycles for bolts in tension, bolts in shear, and flange bolts. Bolts are assumed to be in tension. Compressive bolt loads should not be included in the load amplitude. Shear loads should not include reversible loads. The mean stress is not included in the calculation. Reference : DNVGL-RP-C203 Fatigue Design Of Offshore Steel Structures (Download from the DNVGL website) Change Module : Related Modules : |