Overview of cross-sectional deformation redistribution due to ovalisation of bend (and pipe!) elements (Output Table)
The output data table B-REDIS is only available if the Section Model option in Design Function 1 has been set to Ovalising. In that case the Ovalisation redistribution option will be locked in the Ovalising position. This can only be done if the R-module and the Q-module are available.
The table shows the influence of the 'shell'-behaviour of the pipeline on the ovalisation.The 2nd order effect of the ovalisation is taken into account (Ovalising option) as well.
The radial deformation of the cross-section is constituted from the 2nd and 4th harmonic. Higher harmonics are neglected when redistributing.
Each harmonic has its own characteristic wave length in axial direction, the higher the harmonic the shorter the wave length. The characteristic wave length further depends only on the cross-sectional geometry parameters D, t, the bend radius R, the material constants E, Nu and the internal pressure P.
H610552, last changed: 2009-07-28