Can you please clarify how PVElite calculates IP? As shown in the longitudinal stress due to IP between node 40 and 50 reads 13.08 MPa. However, in the load case IP table below, it shows that IP at node 40 is 15.27 and also shows it is 0 at node 50.

Can you please clarify the relationship bewteen the load case table and the longitudinal stress table.


Longitudinal Stresses Due to . . .

| | Long. Str. | Long. Str. |Long. Str. |
From| To | Int. Pres. | Ext. Pres. |Hyd. Pres. |
| | MPa | MPa | MPa |
-------------------------------------------------
10| 20| 15.2717 | -4.45850 | 32.2014 |
20| 30| 13.0800 | -3.83233 | 27.5801 |
30| 40| 10.1578 | -2.99744 | 21.4184 |
40| 50| 13.0800 | -3.83233 | 27.5801 |
50| 60| 15.2717 | -4.47633 | 32.2014 |


Analysis of Load Case 2 : IP
From Tensile All. Tens. Comp. All. Comp. Tens. Comp.
Node Stress Stress Stress Stress Ratio Ratio
10 15.27 97.76 54.50 0.1562
20 13.08 97.76 56.16 0.1338
30 10.16 97.76 58.82 0.1039
30 13.08 97.76 58.82 0.1338
40 15.27 97.76 56.16 0.1562
50 0.00 97.76 0.00 54.50 0.0000 0.0000

To be more specific:

Should IP at node 40 reads 13.08 instead of 15.27

Analysis of Load Case 2 : IP
From Tensile All. Tens. Comp. All. Comp. Tens. Comp.
Node Stress Stress Stress Stress Ratio Ratio
40 15.27 97.76 56.16 0.1562

Hello Yvan

IP represents Design Pressure. To work out the axial stress the approximate formula is PD/4t. I do not know any of these values, so it is impossible for me to sort this one out.

Hi Yvan,

Please check your email. We are still working on this and we will respond to your email.

Thanks Luis,
I confirm receipt of your email. Thanks for helping with this issue,
Regards