Abstract
This paper is concerned with the statistical time and temperature dependent static and creep strengths in the fiber direction of unidirectional CFRP under tension and bending loads. First, the formulation of statistical time and temperature dependent static and creep strengths of CFRP are proposed based on the viscoelasticity of matrix resin. Second, the tensile and flexural static strengths in the fiber direction of unidirectional CFRP are measured at various temperatures. Then, the creep failure times of unidirectional CFRP are predicted statistically using the tensile and flexural static strengths measured at various temperatures and viscoelastic behavior of matrix resin. Third, the tensile and flexural creep failure times of unidirectional CFRP at a constant load and temperature are measured experimentally for comparison with the predicted ones. Furthermore, the characteristics of statistical tensile and flexural creep failure times of unidirectional CFRP are compared with each other.
