For the problem of predicting mechanical properties of unidirectional fiber reinforced composite with uniform arranged fiber

based on the composite micro-mechanical finite element method

the representative volume element (RVE) model with periodic boundary conditions was researched and established

the basic mechanical properties were realized. By comparing simulation results of B/Al fiber reinforced composites which obtained by applying the RVE model with test results and analytical solutions

it showed that prediction of the mesoscopic mechanical model with periodic boundary conditions kept a preferable consistency with test results and analytical solutions

and the efficiency of the RVE model was proved. Based on the mechanical properties test of unidirectional fiber reinforced SiC/TC4 composite sheets

the longitudinal/transverse elastic modulus and Poissons ratio of different layup structures were obtained

and the error between the calculated longitudinal/transverse elastic modulus and the mean value of the respective test values was less than 5%

the comparison of structural mechanics properties predicted results showed that the parameters of elastic mechanics agree well and the calculation model was reasonable.