The influence of damage in the anti-birdcaging tape and plastic sheath on radial instability is examined through continuum finite element analysis. The numerical procedures are calibrated with physical tests on a flexible pipe subject to pure axial compression. An implicit solver is used in order to take advantage of contact modelling capabilities of ABAQUS software package. A parameter study is conducted to examine the effects of pipe damage, of the anti-birdcaging tape and external plastic sheath, on the potential for radial instability or birdcaging mechanism. Correspondence between the physical and numerical simulations provides confidence in the predicted outcomes.

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