Investigation on the fundamental mechanical properties and probabilistic characteristics of unidirectional carbon fiber reinforced polymer composite plates

This paper investigates the fundamental mechanical properties of tension, bending, shear, and torsion for unidirectional carbon fiber-reinforced polymer (CFRP) plates. First, the mechanical properties of tension, bending, shear, and torsion for the unidirectional CFRP plates are tested, and the test results of relevant mechanical parameters are statistically analyzed. Secondly, the failure modes and damage evolution processes are analyzed by observing the failure surface using the scanning electron microscope (SEM). Subsequently, the probabilistic characteristics of the statistical results for the mechanical parameters are analyzed. The parameter fitting is performed using the Normal, Log-normal, and Weibull distributions for goodness-of-fit analysis, respectively. Finally, the appropriate probability distribution types for the mechanical performance parameters of CFRP plates are proposed.