Abstract
In the present study, tensile tests and creep tests of unidirectional CFRP laminates are performed at off-axis angles (15°, 30°, 45°, 60°,75°) and 90°. The purpose of this study is to model the nonlinear deformation behavior and creep deformation behavior. A CFRP material used is T 700 S/2500 carbon/epoxy system. To discuss the effect of temperature, the tests are performed at both room (25℃) and high (65℃) temperatures. In the creep tests, constant tensile stresses are applied on the specimens for 400 minutes. Both longitudinal and transverse strains are recorded as a function of time. The creep compliance increases rapidly for the specimen with large off-axis angles. To model the creep behavior, an effective creep compliance model is applied. It is found that the strain-time behavior in unidirectional laminate can be described by the effective creep compliance model.
