Based on micro mechanics finite element method

the improved micro mechanics model of the representative volume element (RVE) was used to predict effective mechanical properties of continuous fiber reinforced metal matrix composite. Then square diagonally arranged RVE model was used to calculate its mechanical performance

which was better than that of quadrilateral RVE model. Taking continuous fiber reinforced metal matrix composite shaft as research objects

a micro and macro mechanics model of continuous fiber reinforced metal matrix composite shaft was built. The carrying capacity of this shaft

the rule of shaft carrying capacity

critical buckling load

and critical speed under the influence on different arrays between fiber and matrix were calculated. On this basis

in order to achieve optimization design about laminate scheme of continuous fiber reinforced metal matrix composite shaft

total thickness was taken as objective function with design condition of an aero-engine

and laminate scheme from micro RVE to macro shaft was obtained by random design method.Result shows that

use square diagonally arranged RVE model to calculate the mechanical performance is better than that of quadrilateral RVE model. Fiber and matrix is square diagonally arranged shaft carrying capacity

the critical buckling load and critical speed can be improved. The scheme is the same as GE(General Electric) Company SiC/Ti low pressure turbine shaft layer solution.