ANALYTICAL PREDICTION OF BEHAVIOUR OF DAMAGED COMPOSITE TUBULAR STRUCTURES UNDER QUASI-STATIC PRESSURE

The aim of this paper is to develop analytical model of viscoelastic behaviour for damaged multilayer tubular structures in long fibers. The developed model is used to simulate the viscoelastic response of cylindrical composite structure under different types of loading such as pure internal pressure, tension and finally internal pressure with end effect. The suggested analytical model provides an exact solution for stresses and strains for pipes and on the cylindrical section of vessel submitted to mechanical static loading. Some analytical results are compared with experimental testing from previous works, a good correlation is observed. Based to these results, the future paper is devoted to take into account the viscoelasticity coupled to damage behaviour under fatigue pressure loading, comparing experimental results obtained on prototypes of tubular structure. In order to predict the time remaining before failure of multilayered cylindrical structures, the forthcoming paper is devoted to take into account the viscoelasticity coupled to damage behaviour under cyclic loading of pressure, comparing experimental results obtained on prototypes of cylindrical structure.