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Modelling of behaviour of spiral weld of high-pressure gas pipelines
Jíra, J. ; Jírová, Jitka ; Micka, Michal
The local effect of notches in the form of long cuttingson the development of deformations in the wall of a spiralwelded pipeline were modelled in the course of the hydraulicstrength test of hp gas pipelines. The influence of notchesand the spiral weld on the pipe state of stress wereinvestigated experimentally together with the numericalsimulation of the behaviour of pipes with defects bymeans of the application of the ANSYS programme.
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Modelling of Local Bulging of a Pipe
Micka, Michal ; Jíra, J.
Local defects affect the stress state in the pipe wall. The stress and strain state in the neighbourhood of the local bulging of the pipe wall can be modelled numerically using the FEM. The model is made from the segment cut-out from the pipe wall with a definite defect in the form of the bulge (owing to the symmetry a quarter of the defect with his neighbourhood can be considered).
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