Mechanical Characteristics of Fiber-Reinforced Flexible Pipe Subjected to Axial Tensile Load

Fiber-reinforced flexible pipes are subjected to large axial tension loads in deep-water applications, which may result the excessive deformation of pipes. Owing anisotropy composite materials, accurately describing tensile behavior these is difficult. Theoretical, numerical, and experimental methods employed this study investigate mechanical characteristics a glass fiber-reinforced unbonded pipe under loads. Based on load–strain relationship each layer, analytical equations considering effect radial first proposed calculate stiffness pipe. A detailed numerical model established simulate prototype test performed 4500 mm long sample using testing machine. The leading roles outer reinforcement layers capacity illustrated by strain energy obtained model. Subsequently, comparison analysis mean fiber direction strains selected sections between results, validates Additionally, stress distributions different discussed based results analysis. Finally, accuracy deformation. This proposes effective theoretical models predict pipe, provides useful references for design structural