Maximum stresses over pipe circumference due to internal forces as a result of overall pipeline behaviour (Output Table)

Table description:

The output data table PSTRMAX provides a list of maximum stresses over the circumference of the cross-sections where calculations have been performed.

The stresses collected in this table are the result of the internal forces, bending and twisting moments in the pipeline due to the overall behaviour of the pipeline. The stresses provided are the absolute maximum values over the 48 points over the circumference of the cross-section together with the sign of that extreme value.

Detailed stress data of the last data line of the table are contained in the additional output table PSTRESS.

The table acts in an accumulative way if the unlock option is used.

Each time Design Function 6.2 is restarted, the result data are added for the cross-sections specified in table SECTION with basic data not contained yet in CSGEN/CSLOAD/CSWEIGH. However, if Design Function 6.2 is set back, all data in table PSTRMAX are destroyed and the table gets the EMPTY status.

The loadcase name and the phase number, if applicable, are shown in the table heading.

Explanation of the abbreviations in the stress-component mnemonics:

Each detailed stress component mnemonic contains five elements:

 

1.

S:

(normal) stress component

 

T:

shear stress component

 

2.

X:

stress acts in longitudinal direction (parallel to x-axis of element)

 

F:

stress acts in circumferential direction (perpendicular to x-axis)

 

Z:

shear stress acts in X-F plane (plane of pipe wall)

 

X:

shear stress acts in F-R plane (plane of pipe wall cross-section)

 

3.

U:

uniform stress distribution over wall thickness

 

I:

stress at inner wall location (non-uniform stress distribution)

 

O:

stress at outer wall location (non-uniform stress distribution)

 

M:

shear stress at mid-wall location (non-uniform stress distribution)

 

4.

B:

stress results from 'beam' behaviour of pipeline

 

S:

stress results from 'shell' behaviour of bends of pipeline

 

R:

stress results from 'ring' behaviour of cross-section

 

5.

0:

0-Fourier harmonic (constant over circumference)

 

1:

1-Fourier harmonic (sin(FIE) curve over circumference)

 

H:

sum of n-Fourier harmonics (sum sin(n*FIE) curves over circumference, n > 1)

 

A:

sum of all Fourier harmonics (sum sin(n*FIE) curves over circumference n 0)

 

P:

stress in excess of yield stress applied as a correction

 

Each summated stress component mnemonic contains four elements :

1,2,3

see explanation above

 

2.

additional

 

 

E:

equivalent stress according to Von Mises' theorem

 

3.

additional

 

 

H:

higher of stresses at inner and outer wall location

 

4.

T:

all stress components summated

 

 

 

M:

 

for all stresses : absolute (signed) maximum over circumference


H620522, last changed: 2009-07-20

See also:

Data description/conditions

Table error description

Design Function 6.2 (General, Material Linear)