Research on the fatigue properties of fiber reinforced thermoplastic composite pipes
Fiber reinforced thermoplastic composite pipe(FRTP)has a broad application prospect in the field of offshore engineering due to its small bending stiffness,light weight and good corrosion resistance.This paper takes FRTP as the research object,obtains S-N curve through tensile uniaxial fatigue test,establishes FRTP three-dimensional finite element model based on ABAQUS finite element software,and uses FORTRAN language to compile UMAT subroutine to simulate its σmax=80％σs.65％σs、55％σs、40％σs the fatigue process under four kinds of stress level fatigue load,focusing on the fatigue analysis from two aspects of strain and deformation,and finally σ The fatigue process of FRTP under s stress level fatigue load is predicted.The results show that the stiffness of the pipeline decreases gradually with the increase of load cycles.In the early stage of fatigue life,the higher the load stress level,the faster the stiffness decay.The finite element mod-el can effectively simulate the fatigue process of FRTP,predict its fatigue life,and provide an effective basis for engineering practice.
composite material pipefatiguesecondary developmentfinite elementresidual stiffness
万方数据
维普
