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#41994 - 03/30/11 01:38 PM Internal Pressure Calculation
Yvan_Lanthier Offline
Member

Registered: 03/15/11
Posts: 6
Loc: Montreal, Canada
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

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#41995 - 03/30/11 01:52 PM Re: Internal Pressure Calculation [Re: Yvan_Lanthier]
Yvan_Lanthier Offline
Member

Registered: 03/15/11
Posts: 6
Loc: Montreal, Canada
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

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#42044 - 03/31/11 12:57 PM Re: Internal Pressure Calculation [Re: Yvan_Lanthier]
Ray_Delaforce Offline
Member

Registered: 01/02/03
Posts: 743
Loc: Houston, TX
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.
_________________________
Sincerely,
Ray Delaforce
CADWorx & Analysis Solutions
Hexagon PPM

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#42151 - 04/04/11 09:24 AM Re: Internal Pressure Calculation [Re: Ray_Delaforce]
Luis Sanjuan Offline
Member

Registered: 08/19/08
Posts: 87
Loc: Houston,TX, USA
Hi Yvan,

Please check your email. We are still working on this and we will respond to your email.
_________________________
Best Regards,
Luis Sanjuan


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#42164 - 04/04/11 08:38 PM Re: Internal Pressure Calculation [Re: Luis Sanjuan]
Yvan_Lanthier Offline
Member

Registered: 03/15/11
Posts: 6
Loc: Montreal, Canada
Thanks Luis,
I confirm receipt of your email. Thanks for helping with this issue,
Regards

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