Time and Temperature Dependence on Flexural Static, Creep and Fatigue Fracture Behaviors of Unidirectional CFRP Laminates

摘要

The flexural static, creep and fatigue fracture behaviorof unidirectional CFRP laminates of a general type of thermosettingresin with a PAN-based carbon fiber, were investigated by three-pointbending tests over a wide range of temperature and deflection rate.The flexural fracture behavior by the fractographs as well as thestrength of the static, the creep and the fatigue loading remarkablydepend on the testing rate and temperature. The master curves forthese strengths can be produced by using the time-temperaturesuperposition principle. The time-temperature shift factors for thethree kinds of strengths were quantitatively in good agreement withthat for the stress-strain relation of the matrix resins. Therefore thetime and temperature dependences of fracture behavior are mainlycontrolled by the viscoelastic behavior of the matrix resin.