In order to attain composite lattice structures with high load-carrying efficiency

stability of composite circular lattice structures are analyzed by using FEM. Parametric design program is compiled with the APDL language of ANSYS. Changing law of load-to-mass ratio which is attached to thickness of inner skin

thickness of outer skin

winding angle of inner skin and winding angle of outer skin is researched by utilizing the design program . As a result

when winding angles of inner skin and outer skin are equal to 90 degree

load-to-mass ratio of circular lattice structures is the lowest. In addition

when winding angles of inner skin and outer skin are the equal value

effi ciency of lattice structures is not too higher. When winding angle of inner skin and outer skin are not the equal value

and are appropriately selected

load-to-mass ratio of lattice structures can be more higher.