| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | Calculations |
| Date Logged & Current Version | April. 2018 11.03.00.08 |
Problem:
By calculating the Von Mises stress in a separate way, the result it is different respect to the automatically calculated ASD. Why?
Solution:
The ASD check uses the literal equations presented in DNV-OS-F101. For each point, the combined bending moment M (comprising of in-plane and out-plan moments), and combined pipe wall force N (combined axial force at the location) are used for calculation of longitudinal stress. The hoop stress is also calculated as outlined in DNV-OS-F101. The above results are then combined to calculate the effective stress as per the equation provided.
The results for the ASD check will be different from those of Von Mises tress calculation, which is calculated differently.